An RV battery can look perfectly fine in the fall and still greet you with an expensive surprise in the spring. The right winter-storage routine depends on the battery chemistry, the specific model, the RV’s charging system, and the manufacturer’s instructions.
That last part matters. Flooded lead-acid, AGM, and lithium iron phosphate batteries do not all want the same charge level, charger, temperature, or maintenance routine. Treating every RV battery alike can shorten its life—or create a safety concern.
Start by identifying the battery.
Before disconnecting, charging, or storing anything, locate the label and determine whether the battery is flooded lead-acid, AGM, or lithium iron phosphate (LiFePO4). If the label is missing or the battery bank has been modified, have the system identified professionally.
Why RV Batteries Die During Storage
Even when the RV is parked and appears to be turned off, small electrical loads may continue drawing power. Carbon-monoxide and propane detectors, stereos, control boards, inverters, solar equipment, and other electronics can slowly discharge a battery. Batteries also self-discharge over time, although the rate varies by chemistry, temperature, condition, and age.
A deeply discharged lead-acid battery can sulfate and may freeze more easily. A lithium battery stored at an improper charge level or allowed to fall below its safe voltage may enter battery-management-system protection or suffer permanent damage.
Winter Storage at a Glance
Interstate Lead-Acid
- Fully charge before storage
- Clean and inspect the case and terminals
- Check electrolyte on serviceable flooded models
- Use only a compatible lead-acid maintainer
- Monitor charge during storage
Epoch Lithium
- Store at approximately 50–80% charge
- Disconnect all loads
- Power off models equipped with a power button
- Store cool and dry—32–77°F is preferred
- Check voltage monthly
Interstate Lithium
- Store at approximately 60–80% charge
- Disconnect loads and prevent parasitic drain
- Use a charger with the correct lithium profile
- Follow the model’s storage-temperature limits
- For extended storage, follow the required maintenance cycle
Steps to Take Before Storing Any RV Battery
- Turn off the RV and all charging sources.
Follow the RV and battery manufacturers’ shutdown sequence, including shore power, generator, converter/charger, inverter, and solar equipment.
- Inspect before storing.
Do not store a battery that is swollen, cracked, leaking, excessively corroded, unusually hot, or physically damaged.
- Clean safely.
Keep the case and terminals clean and dry. Wear appropriate eye and hand protection, remove jewelry, and avoid placing tools across the terminals.
- Disconnect loads correctly.
A battery-disconnect switch may not isolate every parasitic load. Follow the battery and RV manufacturers’ instructions before removing cables or powering down a battery bank.
- Use the correct charger.
The charger must match the battery chemistry, voltage, capacity, and manufacturer requirements. A charger intended for lead-acid batteries may be inappropriate for lithium, and a lithium profile must not be assumed to fit every model.
Storing Interstate Flooded Lead-Acid and AGM Batteries
Lead-acid batteries should enter storage fully charged and should not be allowed to remain discharged. Clean the case and terminals, inspect for damage and corrosion, and monitor the state of charge throughout storage.
For serviceable flooded batteries, check electrolyte only according to the battery manufacturer’s directions. Use appropriate protective equipment and add only the specified water when required—never casually add acid. AGM batteries are sealed and must not be opened.
If a maintainer is used, it should be an automatic, chemistry-compatible unit approved for that battery. A generic “trickle charger” that does not properly regulate voltage can overcharge a battery, accelerate water loss, or cause damage.
Battery myth: It must be stored off concrete.
Modern battery cases are not discharged merely because they sit on a concrete floor. A clean, dry, stable surface is sensible, but the real concerns are charge level, contamination, moisture, extreme temperature, physical damage, and unintended electrical loads.
Storing Epoch Lithium RV Batteries
Epoch recommends storing its lithium batteries at approximately 50–80% state of charge, disconnecting all connected loads, and turning off models equipped with a power button. For best preservation, Epoch recommends a cool, dry environment between 32°F and 77°F.
Epoch also recommends checking voltage monthly and recharging as necessary to maintain a healthy storage level. Before returning the battery to service, fully recharge it to recalibrate the system and restore maximum performance.
Epoch’s guidance allows short storage at colder temperatures for some models, but recommends a minimum of 32°F when storage will exceed one month. The instructions for the exact Epoch model always control.
Storing Interstate Lithium Batteries
Interstate’s current deep-cycle lithium guidance recommends storing the battery at approximately 60–80% state of charge. Loads should be disconnected, parasitic drain should be addressed, and the battery should be kept within the storage-temperature and humidity limits listed for its model.
For the Interstate deep-cycle lithium models covered by its current manual, storage up to three months allows a broader temperature range than storage lasting up to six months. Interstate also specifies periodic charging, discharging, and recharging for storage extending beyond three months. Follow the manual supplied with the exact battery rather than applying one model’s limits to every Interstate product.
Cold-weather lithium warning
Do not charge a lithium battery below its permitted charging temperature unless the specific battery’s internal protection, heating system, and manufacturer instructions expressly allow it. Charging lithium cells when they are too cold can cause permanent damage and may create a safety hazard. Allow the battery to reach an approved temperature and follow its manual.
Do Not Forget the Chassis Battery
Motorhomes may have both a house battery bank and a separate chassis or starting battery. Disconnecting or maintaining one does not automatically protect the other. Confirm which systems each disconnect switch and charging source actually controls.
Warning Signs You Need Battery Testing
- The battery will not reach or hold the manufacturer’s specified charge
- Lights dim quickly or appliances shut down under normal loads
- The case is swollen, cracked, leaking, or unusually warm
- Terminals repeatedly develop heavy corrosion
- A flooded battery needs water unusually often
- The charger, converter, solar controller, or inverter reports faults
- The battery-management system repeatedly disconnects
- The battery bank contains mismatched ages, capacities, chemistries, or models
A failed battery is not always the entire problem. Parasitic draw, poor cable connections, an incorrect charger profile, a failing converter, or an improperly configured solar controller can produce similar symptoms. Testing the battery and the system helps prevent replacing a battery only to damage the new one.
Prepare the Entire RV for Winter
Battery storage is only one part of protecting an RV during Northern Colorado’s off-season. Plumbing winterization, roof and sealant inspection, tire condition, rodent prevention, and appliance preparation also deserve attention before extended storage.
Need Help With Your RV Battery System?
Colorado’s Premier RV Services carries Interstate lead-acid batteries and Epoch lithium batteries. We can test your RV batteries, investigate charging or parasitic-draw concerns, replace failed batteries, and evaluate whether a lithium upgrade is appropriate for your RV and charging system.
We service RVs 19 years old and newer, specialize in the house side of RVs, and perform all work at our Berthoud repair facility. We do not provide mobile or emergency service.
Call 970-342-6957
Manufacturer references:
Interstate RV battery guidance, Interstate deep-cycle lithium manual, and Epoch winter-storage guidance. Always follow the instructions for the specific battery model installed in your RV.
An RV battery can look perfectly fine in the fall and still greet you with an expensive surprise in the spring. The right winter-storage routine depends on the battery chemistry, the specific model, the RV’s charging system, and the manufacturer’s instructions.
That last part matters. Flooded lead-acid, AGM, and lithium iron phosphate batteries do not all want the same charge level, charger, temperature, or maintenance routine. Treating every RV battery alike can shorten its life—or create a safety concern.
Start by identifying the battery.
Before disconnecting, charging, or storing anything, locate the label and determine whether the battery is flooded lead-acid, AGM, or lithium iron phosphate (LiFePO4). If the label is missing or the battery bank has been modified, have the system identified professionally.
Why RV Batteries Die During Storage
Even when the RV is parked and appears to be turned off, small electrical loads may continue drawing power. Carbon-monoxide and propane detectors, stereos, control boards, inverters, solar equipment, and other electronics can slowly discharge a battery. Batteries also self-discharge over time, although the rate varies by chemistry, temperature, condition, and age.
A deeply discharged lead-acid battery can sulfate and may freeze more easily. A lithium battery stored at an improper charge level or allowed to fall below its safe voltage may enter battery-management-system protection or suffer permanent damage.
Winter Storage at a Glance
Interstate Lead-Acid
- Fully charge before storage
- Clean and inspect the case and terminals
- Check electrolyte on serviceable flooded models
- Use only a compatible lead-acid maintainer
- Monitor charge during storage
Epoch Lithium
- Store at approximately 50–80% charge
- Disconnect all loads
- Power off models equipped with a power button
- Store cool and dry—32–77°F is preferred
- Check voltage monthly
Interstate Lithium
- Store at approximately 60–80% charge
- Disconnect loads and prevent parasitic drain
- Use a charger with the correct lithium profile
- Follow the model’s storage-temperature limits
- For extended storage, follow the required maintenance cycle
Steps to Take Before Storing Any RV Battery
- Turn off the RV and all charging sources.
Follow the RV and battery manufacturers’ shutdown sequence, including shore power, generator, converter/charger, inverter, and solar equipment.
- Inspect before storing.
Do not store a battery that is swollen, cracked, leaking, excessively corroded, unusually hot, or physically damaged.
- Clean safely.
Keep the case and terminals clean and dry. Wear appropriate eye and hand protection, remove jewelry, and avoid placing tools across the terminals.
- Disconnect loads correctly.
A battery-disconnect switch may not isolate every parasitic load. Follow the battery and RV manufacturers’ instructions before removing cables or powering down a battery bank.
- Use the correct charger.
The charger must match the battery chemistry, voltage, capacity, and manufacturer requirements. A charger intended for lead-acid batteries may be inappropriate for lithium, and a lithium profile must not be assumed to fit every model.
Storing Interstate Flooded Lead-Acid and AGM Batteries
Lead-acid batteries should enter storage fully charged and should not be allowed to remain discharged. Clean the case and terminals, inspect for damage and corrosion, and monitor the state of charge throughout storage.
For serviceable flooded batteries, check electrolyte only according to the battery manufacturer’s directions. Use appropriate protective equipment and add only the specified water when required—never casually add acid. AGM batteries are sealed and must not be opened.
If a maintainer is used, it should be an automatic, chemistry-compatible unit approved for that battery. A generic “trickle charger” that does not properly regulate voltage can overcharge a battery, accelerate water loss, or cause damage.
Battery myth: It must be stored off concrete.
Modern battery cases are not discharged merely because they sit on a concrete floor. A clean, dry, stable surface is sensible, but the real concerns are charge level, contamination, moisture, extreme temperature, physical damage, and unintended electrical loads.
Storing Epoch Lithium RV Batteries
Epoch recommends storing its lithium batteries at approximately 50–80% state of charge, disconnecting all connected loads, and turning off models equipped with a power button. For best preservation, Epoch recommends a cool, dry environment between 32°F and 77°F.
Epoch also recommends checking voltage monthly and recharging as necessary to maintain a healthy storage level. Before returning the battery to service, fully recharge it to recalibrate the system and restore maximum performance.
Epoch’s guidance allows short storage at colder temperatures for some models, but recommends a minimum of 32°F when storage will exceed one month. The instructions for the exact Epoch model always control.
Storing Interstate Lithium Batteries
Interstate’s current deep-cycle lithium guidance recommends storing the battery at approximately 60–80% state of charge. Loads should be disconnected, parasitic drain should be addressed, and the battery should be kept within the storage-temperature and humidity limits listed for its model.
For the Interstate deep-cycle lithium models covered by its current manual, storage up to three months allows a broader temperature range than storage lasting up to six months. Interstate also specifies periodic charging, discharging, and recharging for storage extending beyond three months. Follow the manual supplied with the exact battery rather than applying one model’s limits to every Interstate product.
Cold-weather lithium warning
Do not charge a lithium battery below its permitted charging temperature unless the specific battery’s internal protection, heating system, and manufacturer instructions expressly allow it. Charging lithium cells when they are too cold can cause permanent damage and may create a safety hazard. Allow the battery to reach an approved temperature and follow its manual.
Do Not Forget the Chassis Battery
Motorhomes may have both a house battery bank and a separate chassis or starting battery. Disconnecting or maintaining one does not automatically protect the other. Confirm which systems each disconnect switch and charging source actually controls.
Warning Signs You Need Battery Testing
- The battery will not reach or hold the manufacturer’s specified charge
- Lights dim quickly or appliances shut down under normal loads
- The case is swollen, cracked, leaking, or unusually warm
- Terminals repeatedly develop heavy corrosion
- A flooded battery needs water unusually often
- The charger, converter, solar controller, or inverter reports faults
- The battery-management system repeatedly disconnects
- The battery bank contains mismatched ages, capacities, chemistries, or models
A failed battery is not always the entire problem. Parasitic draw, poor cable connections, an incorrect charger profile, a failing converter, or an improperly configured solar controller can produce similar symptoms. Testing the battery and the system helps prevent replacing a battery only to damage the new one.
Prepare the Entire RV for Winter
Battery storage is only one part of protecting an RV during Northern Colorado’s off-season. Plumbing winterization, roof and sealant inspection, tire condition, rodent prevention, and appliance preparation also deserve attention before extended storage.
Need Help With Your RV Battery System?
Colorado’s Premier RV Services carries Interstate lead-acid batteries and Epoch lithium batteries. We can test your RV batteries, investigate charging or parasitic-draw concerns, replace failed batteries, and evaluate whether a lithium upgrade is appropriate for your RV and charging system.
We service RVs 19 years old and newer, specialize in the house side of RVs, and perform all work at our Berthoud repair facility. We do not provide mobile or emergency service.
Call 970-342-6957
Manufacturer references:
Interstate RV battery guidance, Interstate deep-cycle lithium manual, and Epoch winter-storage guidance. Always follow the instructions for the specific battery model installed in your RV.
An RV battery can look perfectly fine in the fall and still greet you with an expensive surprise in the spring. The right winter-storage routine depends on the battery chemistry, the specific model, the RV’s charging system, and the manufacturer’s instructions.
That last part matters. Flooded lead-acid, AGM, and lithium iron phosphate batteries do not all want the same charge level, charger, temperature, or maintenance routine. Treating every RV battery alike can shorten its life—or create a safety concern.
Start by identifying the battery.
Before disconnecting, charging, or storing anything, locate the label and determine whether the battery is flooded lead-acid, AGM, or lithium iron phosphate (LiFePO4). If the label is missing or the battery bank has been modified, have the system identified professionally.
Why RV Batteries Die During Storage
Even when the RV is parked and appears to be turned off, small electrical loads may continue drawing power. Carbon-monoxide and propane detectors, stereos, control boards, inverters, solar equipment, and other electronics can slowly discharge a battery. Batteries also self-discharge over time, although the rate varies by chemistry, temperature, condition, and age.
A deeply discharged lead-acid battery can sulfate and may freeze more easily. A lithium battery stored at an improper charge level or allowed to fall below its safe voltage may enter battery-management-system protection or suffer permanent damage.
Winter Storage at a Glance
Interstate Lead-Acid
- Fully charge before storage
- Clean and inspect the case and terminals
- Check electrolyte on serviceable flooded models
- Use only a compatible lead-acid maintainer
- Monitor charge during storage
Epoch Lithium
- Store at approximately 50–80% charge
- Disconnect all loads
- Power off models equipped with a power button
- Store cool and dry—32–77°F is preferred
- Check voltage monthly
Interstate Lithium
- Store at approximately 60–80% charge
- Disconnect loads and prevent parasitic drain
- Use a charger with the correct lithium profile
- Follow the model’s storage-temperature limits
- For extended storage, follow the required maintenance cycle
Steps to Take Before Storing Any RV Battery
- Turn off the RV and all charging sources.
Follow the RV and battery manufacturers’ shutdown sequence, including shore power, generator, converter/charger, inverter, and solar equipment.
- Inspect before storing.
Do not store a battery that is swollen, cracked, leaking, excessively corroded, unusually hot, or physically damaged.
- Clean safely.
Keep the case and terminals clean and dry. Wear appropriate eye and hand protection, remove jewelry, and avoid placing tools across the terminals.
- Disconnect loads correctly.
A battery-disconnect switch may not isolate every parasitic load. Follow the battery and RV manufacturers’ instructions before removing cables or powering down a battery bank.
- Use the correct charger.
The charger must match the battery chemistry, voltage, capacity, and manufacturer requirements. A charger intended for lead-acid batteries may be inappropriate for lithium, and a lithium profile must not be assumed to fit every model.
Storing Interstate Flooded Lead-Acid and AGM Batteries
Lead-acid batteries should enter storage fully charged and should not be allowed to remain discharged. Clean the case and terminals, inspect for damage and corrosion, and monitor the state of charge throughout storage.
For serviceable flooded batteries, check electrolyte only according to the battery manufacturer’s directions. Use appropriate protective equipment and add only the specified water when required—never casually add acid. AGM batteries are sealed and must not be opened.
If a maintainer is used, it should be an automatic, chemistry-compatible unit approved for that battery. A generic “trickle charger” that does not properly regulate voltage can overcharge a battery, accelerate water loss, or cause damage.
Battery myth: It must be stored off concrete.
Modern battery cases are not discharged merely because they sit on a concrete floor. A clean, dry, stable surface is sensible, but the real concerns are charge level, contamination, moisture, extreme temperature, physical damage, and unintended electrical loads.
Storing Epoch Lithium RV Batteries
Epoch recommends storing its lithium batteries at approximately 50–80% state of charge, disconnecting all connected loads, and turning off models equipped with a power button. For best preservation, Epoch recommends a cool, dry environment between 32°F and 77°F.
Epoch also recommends checking voltage monthly and recharging as necessary to maintain a healthy storage level. Before returning the battery to service, fully recharge it to recalibrate the system and restore maximum performance.
Epoch’s guidance allows short storage at colder temperatures for some models, but recommends a minimum of 32°F when storage will exceed one month. The instructions for the exact Epoch model always control.
Storing Interstate Lithium Batteries
Interstate’s current deep-cycle lithium guidance recommends storing the battery at approximately 60–80% state of charge. Loads should be disconnected, parasitic drain should be addressed, and the battery should be kept within the storage-temperature and humidity limits listed for its model.
For the Interstate deep-cycle lithium models covered by its current manual, storage up to three months allows a broader temperature range than storage lasting up to six months. Interstate also specifies periodic charging, discharging, and recharging for storage extending beyond three months. Follow the manual supplied with the exact battery rather than applying one model’s limits to every Interstate product.
Cold-weather lithium warning
Do not charge a lithium battery below its permitted charging temperature unless the specific battery’s internal protection, heating system, and manufacturer instructions expressly allow it. Charging lithium cells when they are too cold can cause permanent damage and may create a safety hazard. Allow the battery to reach an approved temperature and follow its manual.
Do Not Forget the Chassis Battery
Motorhomes may have both a house battery bank and a separate chassis or starting battery. Disconnecting or maintaining one does not automatically protect the other. Confirm which systems each disconnect switch and charging source actually controls.
Warning Signs You Need Battery Testing
- The battery will not reach or hold the manufacturer’s specified charge
- Lights dim quickly or appliances shut down under normal loads
- The case is swollen, cracked, leaking, or unusually warm
- Terminals repeatedly develop heavy corrosion
- A flooded battery needs water unusually often
- The charger, converter, solar controller, or inverter reports faults
- The battery-management system repeatedly disconnects
- The battery bank contains mismatched ages, capacities, chemistries, or models
A failed battery is not always the entire problem. Parasitic draw, poor cable connections, an incorrect charger profile, a failing converter, or an improperly configured solar controller can produce similar symptoms. Testing the battery and the system helps prevent replacing a battery only to damage the new one.
Prepare the Entire RV for Winter
Battery storage is only one part of protecting an RV during Northern Colorado’s off-season. Plumbing winterization, roof and sealant inspection, tire condition, rodent prevention, and appliance preparation also deserve attention before extended storage.
Need Help With Your RV Battery System?
Colorado’s Premier RV Services carries Interstate lead-acid batteries and Epoch lithium batteries. We can test your RV batteries, investigate charging or parasitic-draw concerns, replace failed batteries, and evaluate whether a lithium upgrade is appropriate for your RV and charging system.
We service RVs 19 years old and newer, specialize in the house side of RVs, and perform all work at our Berthoud repair facility. We do not provide mobile or emergency service.
Call 970-342-6957
Manufacturer references:
Interstate RV battery guidance, Interstate deep-cycle lithium manual, and Epoch winter-storage guidance. Always follow the instructions for the specific battery model installed in your RV.
An RV battery can look perfectly fine in the fall and still greet you with an expensive surprise in the spring. The right winter-storage routine depends on the battery chemistry, the specific model, the RV’s charging system, and the manufacturer’s instructions.
That last part matters. Flooded lead-acid, AGM, and lithium iron phosphate batteries do not all want the same charge level, charger, temperature, or maintenance routine. Treating every RV battery alike can shorten its life—or create a safety concern.
Start by identifying the battery.
Before disconnecting, charging, or storing anything, locate the label and determine whether the battery is flooded lead-acid, AGM, or lithium iron phosphate (LiFePO4). If the label is missing or the battery bank has been modified, have the system identified professionally.
Why RV Batteries Die During Storage
Even when the RV is parked and appears to be turned off, small electrical loads may continue drawing power. Carbon-monoxide and propane detectors, stereos, control boards, inverters, solar equipment, and other electronics can slowly discharge a battery. Batteries also self-discharge over time, although the rate varies by chemistry, temperature, condition, and age.
A deeply discharged lead-acid battery can sulfate and may freeze more easily. A lithium battery stored at an improper charge level or allowed to fall below its safe voltage may enter battery-management-system protection or suffer permanent damage.
Winter Storage at a Glance
Interstate Lead-Acid
- Fully charge before storage
- Clean and inspect the case and terminals
- Check electrolyte on serviceable flooded models
- Use only a compatible lead-acid maintainer
- Monitor charge during storage
Epoch Lithium
- Store at approximately 50–80% charge
- Disconnect all loads
- Power off models equipped with a power button
- Store cool and dry—32–77°F is preferred
- Check voltage monthly
Interstate Lithium
- Store at approximately 60–80% charge
- Disconnect loads and prevent parasitic drain
- Use a charger with the correct lithium profile
- Follow the model’s storage-temperature limits
- For extended storage, follow the required maintenance cycle
Steps to Take Before Storing Any RV Battery
- Turn off the RV and all charging sources.
Follow the RV and battery manufacturers’ shutdown sequence, including shore power, generator, converter/charger, inverter, and solar equipment.
- Inspect before storing.
Do not store a battery that is swollen, cracked, leaking, excessively corroded, unusually hot, or physically damaged.
- Clean safely.
Keep the case and terminals clean and dry. Wear appropriate eye and hand protection, remove jewelry, and avoid placing tools across the terminals.
- Disconnect loads correctly.
A battery-disconnect switch may not isolate every parasitic load. Follow the battery and RV manufacturers’ instructions before removing cables or powering down a battery bank.
- Use the correct charger.
The charger must match the battery chemistry, voltage, capacity, and manufacturer requirements. A charger intended for lead-acid batteries may be inappropriate for lithium, and a lithium profile must not be assumed to fit every model.
Storing Interstate Flooded Lead-Acid and AGM Batteries
Lead-acid batteries should enter storage fully charged and should not be allowed to remain discharged. Clean the case and terminals, inspect for damage and corrosion, and monitor the state of charge throughout storage.
For serviceable flooded batteries, check electrolyte only according to the battery manufacturer’s directions. Use appropriate protective equipment and add only the specified water when required—never casually add acid. AGM batteries are sealed and must not be opened.
If a maintainer is used, it should be an automatic, chemistry-compatible unit approved for that battery. A generic “trickle charger” that does not properly regulate voltage can overcharge a battery, accelerate water loss, or cause damage.
Battery myth: It must be stored off concrete.
Modern battery cases are not discharged merely because they sit on a concrete floor. A clean, dry, stable surface is sensible, but the real concerns are charge level, contamination, moisture, extreme temperature, physical damage, and unintended electrical loads.
Storing Epoch Lithium RV Batteries
Epoch recommends storing its lithium batteries at approximately 50–80% state of charge, disconnecting all connected loads, and turning off models equipped with a power button. For best preservation, Epoch recommends a cool, dry environment between 32°F and 77°F.
Epoch also recommends checking voltage monthly and recharging as necessary to maintain a healthy storage level. Before returning the battery to service, fully recharge it to recalibrate the system and restore maximum performance.
Epoch’s guidance allows short storage at colder temperatures for some models, but recommends a minimum of 32°F when storage will exceed one month. The instructions for the exact Epoch model always control.
Storing Interstate Lithium Batteries
Interstate’s current deep-cycle lithium guidance recommends storing the battery at approximately 60–80% state of charge. Loads should be disconnected, parasitic drain should be addressed, and the battery should be kept within the storage-temperature and humidity limits listed for its model.
For the Interstate deep-cycle lithium models covered by its current manual, storage up to three months allows a broader temperature range than storage lasting up to six months. Interstate also specifies periodic charging, discharging, and recharging for storage extending beyond three months. Follow the manual supplied with the exact battery rather than applying one model’s limits to every Interstate product.
Cold-weather lithium warning
Do not charge a lithium battery below its permitted charging temperature unless the specific battery’s internal protection, heating system, and manufacturer instructions expressly allow it. Charging lithium cells when they are too cold can cause permanent damage and may create a safety hazard. Allow the battery to reach an approved temperature and follow its manual.
Do Not Forget the Chassis Battery
Motorhomes may have both a house battery bank and a separate chassis or starting battery. Disconnecting or maintaining one does not automatically protect the other. Confirm which systems each disconnect switch and charging source actually controls.
Warning Signs You Need Battery Testing
- The battery will not reach or hold the manufacturer’s specified charge
- Lights dim quickly or appliances shut down under normal loads
- The case is swollen, cracked, leaking, or unusually warm
- Terminals repeatedly develop heavy corrosion
- A flooded battery needs water unusually often
- The charger, converter, solar controller, or inverter reports faults
- The battery-management system repeatedly disconnects
- The battery bank contains mismatched ages, capacities, chemistries, or models
A failed battery is not always the entire problem. Parasitic draw, poor cable connections, an incorrect charger profile, a failing converter, or an improperly configured solar controller can produce similar symptoms. Testing the battery and the system helps prevent replacing a battery only to damage the new one.
Prepare the Entire RV for Winter
Battery storage is only one part of protecting an RV during Northern Colorado’s off-season. Plumbing winterization, roof and sealant inspection, tire condition, rodent prevention, and appliance preparation also deserve attention before extended storage.
Need Help With Your RV Battery System?
Colorado’s Premier RV Services carries Interstate lead-acid batteries and Epoch lithium batteries. We can test your RV batteries, investigate charging or parasitic-draw concerns, replace failed batteries, and evaluate whether a lithium upgrade is appropriate for your RV and charging system.
We service RVs 19 years old and newer, specialize in the house side of RVs, and perform all work at our Berthoud repair facility. We do not provide mobile or emergency service.
Call 970-342-6957
Manufacturer references:
Interstate RV battery guidance, Interstate deep-cycle lithium manual, and Epoch winter-storage guidance. Always follow the instructions for the specific battery model installed in your RV.
An RV battery can look perfectly fine in the fall and still greet you with an expensive surprise in the spring. The right winter-storage routine depends on the battery chemistry, the specific model, the RV’s charging system, and the manufacturer’s instructions.
That last part matters. Flooded lead-acid, AGM, and lithium iron phosphate batteries do not all want the same charge level, charger, temperature, or maintenance routine. Treating every RV battery alike can shorten its life—or create a safety concern.
Start by identifying the battery.
Before disconnecting, charging, or storing anything, locate the label and determine whether the battery is flooded lead-acid, AGM, or lithium iron phosphate (LiFePO4). If the label is missing or the battery bank has been modified, have the system identified professionally.
Why RV Batteries Die During Storage
Even when the RV is parked and appears to be turned off, small electrical loads may continue drawing power. Carbon-monoxide and propane detectors, stereos, control boards, inverters, solar equipment, and other electronics can slowly discharge a battery. Batteries also self-discharge over time, although the rate varies by chemistry, temperature, condition, and age.
A deeply discharged lead-acid battery can sulfate and may freeze more easily. A lithium battery stored at an improper charge level or allowed to fall below its safe voltage may enter battery-management-system protection or suffer permanent damage.
Winter Storage at a Glance
Interstate Lead-Acid
- Fully charge before storage
- Clean and inspect the case and terminals
- Check electrolyte on serviceable flooded models
- Use only a compatible lead-acid maintainer
- Monitor charge during storage
Epoch Lithium
- Store at approximately 50–80% charge
- Disconnect all loads
- Power off models equipped with a power button
- Store cool and dry—32–77°F is preferred
- Check voltage monthly
Interstate Lithium
- Store at approximately 60–80% charge
- Disconnect loads and prevent parasitic drain
- Use a charger with the correct lithium profile
- Follow the model’s storage-temperature limits
- For extended storage, follow the required maintenance cycle
Steps to Take Before Storing Any RV Battery
- Turn off the RV and all charging sources.
Follow the RV and battery manufacturers’ shutdown sequence, including shore power, generator, converter/charger, inverter, and solar equipment.
- Inspect before storing.
Do not store a battery that is swollen, cracked, leaking, excessively corroded, unusually hot, or physically damaged.
- Clean safely.
Keep the case and terminals clean and dry. Wear appropriate eye and hand protection, remove jewelry, and avoid placing tools across the terminals.
- Disconnect loads correctly.
A battery-disconnect switch may not isolate every parasitic load. Follow the battery and RV manufacturers’ instructions before removing cables or powering down a battery bank.
- Use the correct charger.
The charger must match the battery chemistry, voltage, capacity, and manufacturer requirements. A charger intended for lead-acid batteries may be inappropriate for lithium, and a lithium profile must not be assumed to fit every model.
Storing Interstate Flooded Lead-Acid and AGM Batteries
Lead-acid batteries should enter storage fully charged and should not be allowed to remain discharged. Clean the case and terminals, inspect for damage and corrosion, and monitor the state of charge throughout storage.
For serviceable flooded batteries, check electrolyte only according to the battery manufacturer’s directions. Use appropriate protective equipment and add only the specified water when required—never casually add acid. AGM batteries are sealed and must not be opened.
If a maintainer is used, it should be an automatic, chemistry-compatible unit approved for that battery. A generic “trickle charger” that does not properly regulate voltage can overcharge a battery, accelerate water loss, or cause damage.
Battery myth: It must be stored off concrete.
Modern battery cases are not discharged merely because they sit on a concrete floor. A clean, dry, stable surface is sensible, but the real concerns are charge level, contamination, moisture, extreme temperature, physical damage, and unintended electrical loads.
Storing Epoch Lithium RV Batteries
Epoch recommends storing its lithium batteries at approximately 50–80% state of charge, disconnecting all connected loads, and turning off models equipped with a power button. For best preservation, Epoch recommends a cool, dry environment between 32°F and 77°F.
Epoch also recommends checking voltage monthly and recharging as necessary to maintain a healthy storage level. Before returning the battery to service, fully recharge it to recalibrate the system and restore maximum performance.
Epoch’s guidance allows short storage at colder temperatures for some models, but recommends a minimum of 32°F when storage will exceed one month. The instructions for the exact Epoch model always control.
Storing Interstate Lithium Batteries
Interstate’s current deep-cycle lithium guidance recommends storing the battery at approximately 60–80% state of charge. Loads should be disconnected, parasitic drain should be addressed, and the battery should be kept within the storage-temperature and humidity limits listed for its model.
For the Interstate deep-cycle lithium models covered by its current manual, storage up to three months allows a broader temperature range than storage lasting up to six months. Interstate also specifies periodic charging, discharging, and recharging for storage extending beyond three months. Follow the manual supplied with the exact battery rather than applying one model’s limits to every Interstate product.
Cold-weather lithium warning
Do not charge a lithium battery below its permitted charging temperature unless the specific battery’s internal protection, heating system, and manufacturer instructions expressly allow it. Charging lithium cells when they are too cold can cause permanent damage and may create a safety hazard. Allow the battery to reach an approved temperature and follow its manual.
Do Not Forget the Chassis Battery
Motorhomes may have both a house battery bank and a separate chassis or starting battery. Disconnecting or maintaining one does not automatically protect the other. Confirm which systems each disconnect switch and charging source actually controls.
Warning Signs You Need Battery Testing
- The battery will not reach or hold the manufacturer’s specified charge
- Lights dim quickly or appliances shut down under normal loads
- The case is swollen, cracked, leaking, or unusually warm
- Terminals repeatedly develop heavy corrosion
- A flooded battery needs water unusually often
- The charger, converter, solar controller, or inverter reports faults
- The battery-management system repeatedly disconnects
- The battery bank contains mismatched ages, capacities, chemistries, or models
A failed battery is not always the entire problem. Parasitic draw, poor cable connections, an incorrect charger profile, a failing converter, or an improperly configured solar controller can produce similar symptoms. Testing the battery and the system helps prevent replacing a battery only to damage the new one.
Prepare the Entire RV for Winter
Battery storage is only one part of protecting an RV during Northern Colorado’s off-season. Plumbing winterization, roof and sealant inspection, tire condition, rodent prevention, and appliance preparation also deserve attention before extended storage.
Need Help With Your RV Battery System?
Colorado’s Premier RV Services carries Interstate lead-acid batteries and Epoch lithium batteries. We can test your RV batteries, investigate charging or parasitic-draw concerns, replace failed batteries, and evaluate whether a lithium upgrade is appropriate for your RV and charging system.
We service RVs 19 years old and newer, specialize in the house side of RVs, and perform all work at our Berthoud repair facility. We do not provide mobile or emergency service.
Call 970-342-6957
Manufacturer references:
Interstate RV battery guidance, Interstate deep-cycle lithium manual, and Epoch winter-storage guidance. Always follow the instructions for the specific battery model installed in your RV.
An RV battery can look perfectly fine in the fall and still greet you with an expensive surprise in the spring. The right winter-storage routine depends on the battery chemistry, the specific model, the RV’s charging system, and the manufacturer’s instructions.
That last part matters. Flooded lead-acid, AGM, and lithium iron phosphate batteries do not all want the same charge level, charger, temperature, or maintenance routine. Treating every RV battery alike can shorten its life—or create a safety concern.
Start by identifying the battery.
Before disconnecting, charging, or storing anything, locate the label and determine whether the battery is flooded lead-acid, AGM, or lithium iron phosphate (LiFePO4). If the label is missing or the battery bank has been modified, have the system identified professionally.
Why RV Batteries Die During Storage
Even when the RV is parked and appears to be turned off, small electrical loads may continue drawing power. Carbon-monoxide and propane detectors, stereos, control boards, inverters, solar equipment, and other electronics can slowly discharge a battery. Batteries also self-discharge over time, although the rate varies by chemistry, temperature, condition, and age.
A deeply discharged lead-acid battery can sulfate and may freeze more easily. A lithium battery stored at an improper charge level or allowed to fall below its safe voltage may enter battery-management-system protection or suffer permanent damage.
Winter Storage at a Glance
Interstate Lead-Acid
- Fully charge before storage
- Clean and inspect the case and terminals
- Check electrolyte on serviceable flooded models
- Use only a compatible lead-acid maintainer
- Monitor charge during storage
Epoch Lithium
- Store at approximately 50–80% charge
- Disconnect all loads
- Power off models equipped with a power button
- Store cool and dry—32–77°F is preferred
- Check voltage monthly
Interstate Lithium
- Store at approximately 60–80% charge
- Disconnect loads and prevent parasitic drain
- Use a charger with the correct lithium profile
- Follow the model’s storage-temperature limits
- For extended storage, follow the required maintenance cycle
Steps to Take Before Storing Any RV Battery
- Turn off the RV and all charging sources.
Follow the RV and battery manufacturers’ shutdown sequence, including shore power, generator, converter/charger, inverter, and solar equipment.
- Inspect before storing.
Do not store a battery that is swollen, cracked, leaking, excessively corroded, unusually hot, or physically damaged.
- Clean safely.
Keep the case and terminals clean and dry. Wear appropriate eye and hand protection, remove jewelry, and avoid placing tools across the terminals.
- Disconnect loads correctly.
A battery-disconnect switch may not isolate every parasitic load. Follow the battery and RV manufacturers’ instructions before removing cables or powering down a battery bank.
- Use the correct charger.
The charger must match the battery chemistry, voltage, capacity, and manufacturer requirements. A charger intended for lead-acid batteries may be inappropriate for lithium, and a lithium profile must not be assumed to fit every model.
Storing Interstate Flooded Lead-Acid and AGM Batteries
Lead-acid batteries should enter storage fully charged and should not be allowed to remain discharged. Clean the case and terminals, inspect for damage and corrosion, and monitor the state of charge throughout storage.
For serviceable flooded batteries, check electrolyte only according to the battery manufacturer’s directions. Use appropriate protective equipment and add only the specified water when required—never casually add acid. AGM batteries are sealed and must not be opened.
If a maintainer is used, it should be an automatic, chemistry-compatible unit approved for that battery. A generic “trickle charger” that does not properly regulate voltage can overcharge a battery, accelerate water loss, or cause damage.
Battery myth: It must be stored off concrete.
Modern battery cases are not discharged merely because they sit on a concrete floor. A clean, dry, stable surface is sensible, but the real concerns are charge level, contamination, moisture, extreme temperature, physical damage, and unintended electrical loads.
Storing Epoch Lithium RV Batteries
Epoch recommends storing its lithium batteries at approximately 50–80% state of charge, disconnecting all connected loads, and turning off models equipped with a power button. For best preservation, Epoch recommends a cool, dry environment between 32°F and 77°F.
Epoch also recommends checking voltage monthly and recharging as necessary to maintain a healthy storage level. Before returning the battery to service, fully recharge it to recalibrate the system and restore maximum performance.
Epoch’s guidance allows short storage at colder temperatures for some models, but recommends a minimum of 32°F when storage will exceed one month. The instructions for the exact Epoch model always control.
Storing Interstate Lithium Batteries
Interstate’s current deep-cycle lithium guidance recommends storing the battery at approximately 60–80% state of charge. Loads should be disconnected, parasitic drain should be addressed, and the battery should be kept within the storage-temperature and humidity limits listed for its model.
For the Interstate deep-cycle lithium models covered by its current manual, storage up to three months allows a broader temperature range than storage lasting up to six months. Interstate also specifies periodic charging, discharging, and recharging for storage extending beyond three months. Follow the manual supplied with the exact battery rather than applying one model’s limits to every Interstate product.
Cold-weather lithium warning
Do not charge a lithium battery below its permitted charging temperature unless the specific battery’s internal protection, heating system, and manufacturer instructions expressly allow it. Charging lithium cells when they are too cold can cause permanent damage and may create a safety hazard. Allow the battery to reach an approved temperature and follow its manual.
Do Not Forget the Chassis Battery
Motorhomes may have both a house battery bank and a separate chassis or starting battery. Disconnecting or maintaining one does not automatically protect the other. Confirm which systems each disconnect switch and charging source actually controls.
Warning Signs You Need Battery Testing
- The battery will not reach or hold the manufacturer’s specified charge
- Lights dim quickly or appliances shut down under normal loads
- The case is swollen, cracked, leaking, or unusually warm
- Terminals repeatedly develop heavy corrosion
- A flooded battery needs water unusually often
- The charger, converter, solar controller, or inverter reports faults
- The battery-management system repeatedly disconnects
- The battery bank contains mismatched ages, capacities, chemistries, or models
A failed battery is not always the entire problem. Parasitic draw, poor cable connections, an incorrect charger profile, a failing converter, or an improperly configured solar controller can produce similar symptoms. Testing the battery and the system helps prevent replacing a battery only to damage the new one.
Prepare the Entire RV for Winter
Battery storage is only one part of protecting an RV during Northern Colorado’s off-season. Plumbing winterization, roof and sealant inspection, tire condition, rodent prevention, and appliance preparation also deserve attention before extended storage.
Need Help With Your RV Battery System?
Colorado’s Premier RV Services carries Interstate lead-acid batteries and Epoch lithium batteries. We can test your RV batteries, investigate charging or parasitic-draw concerns, replace failed batteries, and evaluate whether a lithium upgrade is appropriate for your RV and charging system.
We service RVs 19 years old and newer, specialize in the house side of RVs, and perform all work at our Berthoud repair facility. We do not provide mobile or emergency service.
Call 970-342-6957
Manufacturer references:
Interstate RV battery guidance, Interstate deep-cycle lithium manual, and Epoch winter-storage guidance. Always follow the instructions for the specific battery model installed in your RV.
An RV battery can look perfectly fine in the fall and still greet you with an expensive surprise in the spring. The right winter-storage routine depends on the battery chemistry, the specific model, the RV’s charging system, and the manufacturer’s instructions.
That last part matters. Flooded lead-acid, AGM, and lithium iron phosphate batteries do not all want the same charge level, charger, temperature, or maintenance routine. Treating every RV battery alike can shorten its life—or create a safety concern.
Start by identifying the battery.
Before disconnecting, charging, or storing anything, locate the label and determine whether the battery is flooded lead-acid, AGM, or lithium iron phosphate (LiFePO4). If the label is missing or the battery bank has been modified, have the system identified professionally.
Why RV Batteries Die During Storage
Even when the RV is parked and appears to be turned off, small electrical loads may continue drawing power. Carbon-monoxide and propane detectors, stereos, control boards, inverters, solar equipment, and other electronics can slowly discharge a battery. Batteries also self-discharge over time, although the rate varies by chemistry, temperature, condition, and age.
A deeply discharged lead-acid battery can sulfate and may freeze more easily. A lithium battery stored at an improper charge level or allowed to fall below its safe voltage may enter battery-management-system protection or suffer permanent damage.
Winter Storage at a Glance
Interstate Lead-Acid
- Fully charge before storage
- Clean and inspect the case and terminals
- Check electrolyte on serviceable flooded models
- Use only a compatible lead-acid maintainer
- Monitor charge during storage
Epoch Lithium
- Store at approximately 50–80% charge
- Disconnect all loads
- Power off models equipped with a power button
- Store cool and dry—32–77°F is preferred
- Check voltage monthly
Interstate Lithium
- Store at approximately 60–80% charge
- Disconnect loads and prevent parasitic drain
- Use a charger with the correct lithium profile
- Follow the model’s storage-temperature limits
- For extended storage, follow the required maintenance cycle
Steps to Take Before Storing Any RV Battery
- Turn off the RV and all charging sources.
Follow the RV and battery manufacturers’ shutdown sequence, including shore power, generator, converter/charger, inverter, and solar equipment.
- Inspect before storing.
Do not store a battery that is swollen, cracked, leaking, excessively corroded, unusually hot, or physically damaged.
- Clean safely.
Keep the case and terminals clean and dry. Wear appropriate eye and hand protection, remove jewelry, and avoid placing tools across the terminals.
- Disconnect loads correctly.
A battery-disconnect switch may not isolate every parasitic load. Follow the battery and RV manufacturers’ instructions before removing cables or powering down a battery bank.
- Use the correct charger.
The charger must match the battery chemistry, voltage, capacity, and manufacturer requirements. A charger intended for lead-acid batteries may be inappropriate for lithium, and a lithium profile must not be assumed to fit every model.
Storing Interstate Flooded Lead-Acid and AGM Batteries
Lead-acid batteries should enter storage fully charged and should not be allowed to remain discharged. Clean the case and terminals, inspect for damage and corrosion, and monitor the state of charge throughout storage.
For serviceable flooded batteries, check electrolyte only according to the battery manufacturer’s directions. Use appropriate protective equipment and add only the specified water when required—never casually add acid. AGM batteries are sealed and must not be opened.
If a maintainer is used, it should be an automatic, chemistry-compatible unit approved for that battery. A generic “trickle charger” that does not properly regulate voltage can overcharge a battery, accelerate water loss, or cause damage.
Battery myth: It must be stored off concrete.
Modern battery cases are not discharged merely because they sit on a concrete floor. A clean, dry, stable surface is sensible, but the real concerns are charge level, contamination, moisture, extreme temperature, physical damage, and unintended electrical loads.
Storing Epoch Lithium RV Batteries
Epoch recommends storing its lithium batteries at approximately 50–80% state of charge, disconnecting all connected loads, and turning off models equipped with a power button. For best preservation, Epoch recommends a cool, dry environment between 32°F and 77°F.
Epoch also recommends checking voltage monthly and recharging as necessary to maintain a healthy storage level. Before returning the battery to service, fully recharge it to recalibrate the system and restore maximum performance.
Epoch’s guidance allows short storage at colder temperatures for some models, but recommends a minimum of 32°F when storage will exceed one month. The instructions for the exact Epoch model always control.
Storing Interstate Lithium Batteries
Interstate’s current deep-cycle lithium guidance recommends storing the battery at approximately 60–80% state of charge. Loads should be disconnected, parasitic drain should be addressed, and the battery should be kept within the storage-temperature and humidity limits listed for its model.
For the Interstate deep-cycle lithium models covered by its current manual, storage up to three months allows a broader temperature range than storage lasting up to six months. Interstate also specifies periodic charging, discharging, and recharging for storage extending beyond three months. Follow the manual supplied with the exact battery rather than applying one model’s limits to every Interstate product.
Cold-weather lithium warning
Do not charge a lithium battery below its permitted charging temperature unless the specific battery’s internal protection, heating system, and manufacturer instructions expressly allow it. Charging lithium cells when they are too cold can cause permanent damage and may create a safety hazard. Allow the battery to reach an approved temperature and follow its manual.
Do Not Forget the Chassis Battery
Motorhomes may have both a house battery bank and a separate chassis or starting battery. Disconnecting or maintaining one does not automatically protect the other. Confirm which systems each disconnect switch and charging source actually controls.
Warning Signs You Need Battery Testing
- The battery will not reach or hold the manufacturer’s specified charge
- Lights dim quickly or appliances shut down under normal loads
- The case is swollen, cracked, leaking, or unusually warm
- Terminals repeatedly develop heavy corrosion
- A flooded battery needs water unusually often
- The charger, converter, solar controller, or inverter reports faults
- The battery-management system repeatedly disconnects
- The battery bank contains mismatched ages, capacities, chemistries, or models
A failed battery is not always the entire problem. Parasitic draw, poor cable connections, an incorrect charger profile, a failing converter, or an improperly configured solar controller can produce similar symptoms. Testing the battery and the system helps prevent replacing a battery only to damage the new one.
Prepare the Entire RV for Winter
Battery storage is only one part of protecting an RV during Northern Colorado’s off-season. Plumbing winterization, roof and sealant inspection, tire condition, rodent prevention, and appliance preparation also deserve attention before extended storage.
Need Help With Your RV Battery System?
Colorado’s Premier RV Services carries Interstate lead-acid batteries and Epoch lithium batteries. We can test your RV batteries, investigate charging or parasitic-draw concerns, replace failed batteries, and evaluate whether a lithium upgrade is appropriate for your RV and charging system.
We service RVs 19 years old and newer, specialize in the house side of RVs, and perform all work at our Berthoud repair facility. We do not provide mobile or emergency service.
Call 970-342-6957
Manufacturer references:
Interstate RV battery guidance, Interstate deep-cycle lithium manual, and Epoch winter-storage guidance. Always follow the instructions for the specific battery model installed in your RV.
An RV battery can look perfectly fine in the fall and still greet you with an expensive surprise in the spring. The right winter-storage routine depends on the battery chemistry, the specific model, the RV’s charging system, and the manufacturer’s instructions.
That last part matters. Flooded lead-acid, AG
M, and lithium iron phosphate batteries do not all want the same charge level, charger, temperature, or maintenance routine. Treating every RV battery alike can shorten its life—or create a safety concern.
Start by identifying the battery.
Before disconnecting, charging, or storing anything, locate the label and determine whether the battery is flooded lead-acid, AGM, or lithium iron phosphate (LiFePO4). If the label is missing or the battery bank has been modified, have the system identified professionally.
Why RV Batteries Die During Storage
Even when the RV is parked and appears to be turned off, small electrical loads may continue drawing power. Carbon-monoxide and propane detectors, stereos, control boards, inverters, solar equipment, and other electronics can slowly discharge a battery. Batteries also self-discharge over time, although the rate varies by chemistry, temperature, condition, and age.
A deeply discharged lead-acid battery can sulfate and may freeze more easily. A lithium battery stored at an improper charge level or allowed to fall below its safe voltage may enter battery-management-system protection or suffer permanent damage.
Winter Storage at a Glance
Interstate Lead-Acid
- Fully charge before storage
- Clean and inspect the case and terminals
- Check electrolyte on serviceable flooded models
- Use only a compatible lead-acid maintainer
- Monitor charge during storage
Epoch Lithium
- Store at approximately 50–80% charge
- Disconnect all loads
- Power off models equipped with a power button
- Store cool and dry—32–77°F is preferred
- Check voltage monthly
Interstate Lithium
- Store at approximately 60–80% charge
- Disconnect loads and prevent parasitic drain
- Use a charger with the correct lithium profile
- Follow the model’s storage-temperature limits
- For extended storage, follow the required maintenance cycle
Steps to Take Before Storing Any RV Battery
- Turn off the RV and all charging sources.
Follow the RV and battery manufacturers’ shutdown sequence, including shore power, generator, converter/charger, inverter, and solar equipment.
- Inspect before storing.
Do not store a battery that is swollen, cracked, leaking, excessively corroded, unusually hot, or physically damaged.
- Clean safely.
Keep the case and terminals clean and dry. Wear appropriate eye and hand protection, remove jewelry, and avoid placing tools across the terminals.
- Disconnect loads correctly.
A battery-disconnect switch may not isolate every parasitic load. Follow the battery and RV manufacturers’ instructions before removing cables or powering down a battery bank.
- Use the correct charger.
The charger must match the battery chemistry, voltage, capacity, and manufacturer requirements. A charger intended for lead-acid batteries may be inappropriate for lithium, and a lithium profile must not be assumed to fit every model.
Storing Interstate Flooded Lead-Acid and AGM Batteries
Lead-acid batteries should enter storage fully charged and should not be allowed to remain discharged. Clean the case and terminals, inspect for damage and corrosion, and monitor the state of charge throughout storage.
For serviceable flooded batteries, check electrolyte only according to the battery manufacturer’s directions. Use appropriate protective equipment and add only the specified water when required—never casually add acid. AGM batteries are sealed and must not be opened.
If a maintainer is used, it should be an automatic, chemistry-compatible unit approved for that battery. A generic “trickle charger” that does not properly regulate voltage can overcharge a battery, accelerate water loss, or cause damage.
Battery myth: It must be stored off concrete.
Modern battery cases are not discharged merely because they sit on a concrete floor. A clean, dry, stable surface is sensible, but the real concerns are charge level, contamination, moisture, extreme temperature, physical damage, and unintended electrical loads.
Storing Epoch Lithium RV Batteries
Epoch recommends storing its lithium batteries at approximately 50–80% state of charge, disconnecting all connected loads, and turning off models equipped with a power button. For best preservation, Epoch recommends a cool, dry environment between 32°F and 77°F.
Epoch also recommends checking voltage monthly and recharging as necessary to maintain a healthy storage level. Before returning the battery to service, fully recharge it to recalibrate the system and restore maximum performance.
Epoch’s guidance allows short storage at coler temperatures for some models, but recommends a minimum of 32°F when storage will exceed one month. The instructions for the exact Epoch model always control.
Storing Interstate Lithium Batteries
Interstate’s current deep-cycle lithium guidance recommends storing the battery at approximately 60–80% state of charge. Loads should be disconnected, parasitic drain should be addressed, and the battery should be kept within the storage-temperature and humidity limits listed for its model.
For the Interstate deep-cycle lithium models covered by its current manual, storage up to three months allows a broader temperature range than storage lasting up to six months. Interstate also specifies periodic charging, discharging, and recharging for storage extending beyond three months. Follow the manual supplied with the exact battery rather than applying one model’s limits to every Interstate product.
Cold-weather lithium warning
Do not charge a lithium battery below its permitted charging temperature unless the specific battery’s internal protection, heating system, and manufacturer instructions expressly allow it. Charging lithium cells when they are too cold can cause permanent damage and may create a safety hazard. Allow the battery to reach an approved temperature and follow its manual.
Do Not Forget the Chassis Battery
Motorhomes may have both a house battery bank and a separate chassis or starting battery. Disconnecting or maintaining one does not automatically protect the other. Confirm which systems each disconnect switch and charging source actually controls.
Warning Signs You Need Battery Testing
- The battery will not reach or hold the manufacturer’s specified charge
- Lights dim quickly or appliances shut down under normal loads
- The case is swollen, cracked, leaking, or unusually warm
- Terminals repeatedly develop heavy corrosion
- A flooded battery needs water unusually often
- The charger, converter, solar controller, or inverter reports faults
- The battery-management system repeatedly disconnects
- The battery bank contains mismatched ages, capacities, chemistries, or models
A failed battery is not always the entire problem. Parasitic draw, poor cable connections, an incorrect charger profile, a failing converter, or an improperly configured solar controller can produce similar symptoms. Testing the battery and the system helps prevent replacing a battery only to damage the new one.
Prepare the Entire RV for Winter
Battery storage is only one part of protecting an RV during Northern Colorado’s off-season. Plumbing winterization, roof and sealant inspection, tire condition, rodent prevention, and appliance preparation also deserve attention before extended storage.
Need Help With Your RV Battery System?
Colorado’s Premier RV Services carries Interstate lead-acid batteries and Epoch lithium batteries. We can test your RV batteries, investigate charging or parasitic-draw concerns, replace failed batteries, and evaluate whether a lithium upgrade is appropriate for your RV and charging system.
We service RVs 19 years old and newer, specialize in the house side of RVs, and perform all work at our Berthoud repair facility. We do not provide mobile or emergency service.
Call 970-342-6957
Manufacturer references:
Interstate RV battery guidance, Interstate deep-cycle lithium manual, and Epoch winter-storage guidance. Always follow the instructions for the specific battery model installed in your RV.
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