How to Keep RV Batteries Charged When Your RV is Stored
Batteries in good condition and fully charged can be ’stored’ for up to six months. But that doesn’t count if the batteries are installed in a stored RV. All RVs have what is often referred to as phantom loads. These are draws on the battery such as the refrigerator circuit board, LPG and carbon monoxide detectors, and other such 12-volt power draws that can discharge your battery over time.
Because of phantom loads, RV batteries in a stored RV should be checked periodically and given a boost charge when they go below 70% charge or less.
While we recommend checking your stored RV from time to time here are some ways you can lengthen the time between checks.
Battery Disconnect Switch
A reliable way to keep RV batteries charged when your RV is not in use is to disconnect them. You do this by removing the positive connection from the battery post.
A more convenient method would be to install a disconnect switch rather than removing and replacing the connector each time.
A battery maintainer is meant to compensate for phantom loads and a battery’s normal self-discharge over time in order to maintain a full charge. It may or may not keep the battery charged if you accidentally leave a light on or fan running,
If you have a way to get power to the RV you can use a battery maintainer/trickle charger, like the Schumacher unit shown, to ensure they are kept at full charge.
Solar Powered Battery Maintainer
With no power to the RV, you may be able to use a Solar Battery Charger Maintainer such as this one shown.
A less convenient but still viable way to store your batteries is to remove them from the RV and store them in a place where you can connect them to a battery maintainer or, at the least, check their condition from time to time.
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