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To prepare Dragonfly lithium RV batteries for storage, follow the charging instructions for your battery model, turn off unnecessary loads and battery heat, and shut down charging equipment using the required sequence. Batteries can remain installed when storage conditions meet their specifications and the system is properly isolated. The most important checks are temperature and power draw: cold-weather limits vary by model, and a battery disconnect may not shut off every connected device.
Before leaving batteries in your RV through winter, identify the battery model and check its specified storage temperature range.
Storage, charging and discharging limits are different. A battery’s ability to remain in cold conditions does not mean it can safely accept a charge at the same temperature.
Do not rely on a blanket claim that Dragonfly batteries can be used or stored at −40°F. For example, Dragonfly’s DFGC2H datasheet specifies a storage range of −10°F to 140°F. Use the documentation for your exact model rather than applying that range to every battery.
If temperatures at your storage location could fall outside the approved range, ask your dealer about removing the batteries or choosing a suitable storage location.
Follow your battery manufacturer’s recommended storage charge level. Dragonfly’s published guidance for the DFGC2H calls for charging to 100%, then completely disconnecting the batteries for storage.
Use compatible charging equipment and the correct lithium battery settings. Confirm that charging has finished before beginning the shutdown process.
If the batteries are cold, follow their charging-temperature and heating instructions first. Do not assume that plugging the RV into shore power means cold batteries can immediately accept a charge.
The storage charge recommendation is model-specific. Follow the instructions supplied with replacement or aftermarket batteries if they differ.
If your RV has heated batteries, turn off the Battery Heat switch when you will no longer be actively charging them, as directed by the applicable instructions.
Battery heaters consume stored energy. Leaving heat enabled during disconnected storage can reduce the charge you intended to preserve.
Keystone’s factory-installed Dragonfly heating guide directs owners to disable the heat circuit for storage or when charging is not planned. If charging will continue during cold weather, use the heating procedure specified for that installation.
Solar-equipped RVs require attention to both the solar-panel connection and the battery connection.
If your RV has a PV Solar Panel Disconnect, use it according to your SolarFlex and charge controller instructions. Switch locations and system arrangements vary, so identify the correct disconnect before starting.
For the Victron MPPT controllers covered by the referenced manual, shutdown requires disconnecting the solar-panel supply first, followed by the battery supply to the controller. Restart uses the opposite order: battery supply first, then solar. Follow the instructions for your installed controller.
Turning off the RV’s main battery disconnect does not necessarily disconnect the solar controller from the battery. Do not unplug solar connectors or remove wiring as a substitute for the specified shutdown procedure.
Turn off unnecessary appliances and electrical loads before operating disconnect switches.
If equipped, shut down the inverter using its controls and turn its battery disconnect OFF, following the manufacturer’s instructions. An inverter may have a separate connection that remains powered when the RV’s main disconnect is off.
Turn the Giggy Box battery disconnect OFF as part of the storage procedure for your RV.
Treat these switches as separate controls with specific functions. Avoid assuming that one switch isolates every charging source, accessory and battery-connected component.
Disconnect shore power and other charging sources as required by the storage instructions. If you intend to leave the RV plugged in, confirm the appropriate long-term charging arrangement with your dealer.
Before leaving the RV, check for equipment connected outside the main battery disconnect.
Aftermarket accessories, monitoring equipment and other directly connected devices may require separate attention. A dark interior or an unpowered control panel does not prove that every battery load is disconnected.
Use your system documentation to confirm what each disconnect controls. If you cannot establish that the batteries are isolated as required, have your dealer verify the setup.
For extended storage, follow the battery manufacturer’s inspection and recharge schedule. Do not assume batteries can remain unattended indefinitely simply because lithium batteries have relatively low self-discharge.
Before reconnecting the system, inspect the batteries and accessible connections for damage, moisture or loose hardware.
Confirm that battery temperature is within the permitted charging range. Enable battery heat when required by your equipment’s instructions.
Restore connections using the startup sequence for your system. For the Victron controller procedure described above, reconnect the battery supply before restoring solar-panel input. Then verify charging settings, battery readings and normal system operation.
For a visual overview, watch Keystone’s General Care & Maintenance video.
Review your battery and SolarFlex manuals before storage to confirm the temperature limits and shutdown procedure for your RV.
Disclaimer: The information contained in this article is deemed to be true and accurate at the time of publication. However, due to the evolving nature of our products and services, there may be changes or updates that occur after this article was published. We encourage users to verify the contents and consult with their dealer or Keystone RV for the most current information. If you have any questions or require further clarification, please do not hesitate to contact your dealer or reach out to Keystone RV directly.