Battery Storage

[R. Bear]

Spend 6 months each year in 2 different locations.

Have a Giant Roam ebike in each location.

OK to let the battery sit idle for 6 months in each location or do I need to take both back and forth so I can cycle them?

If OK, what charge level to store them?

Thanks much for any comments.

 

[RunForTheHills]

The battery will self discharge. Six months is borderline. I have a battery from EM3EV with a smart BMS that has very little discharge over that time. I have some of the original LIGO batteries from Grin that don't do nearly as well, even when shutdown.

MTA: The battery from EM3EV is a 52V jumbo shark.

 

[Gionnirocket]

You should be fine at 6 months if your battery is in good condition. I've stored batteries near 1 year with only a 0.2V drop in that time. My current battery stored for 3.5 months at 46v (on a 48v nominal) was just checked at the beginning of the week and it had 0 V loss.
50% charge at room temp is an accepted storage method. If you can remove the battery from the bike it'll eliminate any possible vampire loads built into the system.
I store my garden tool batteries at 50% at the end of each season for 6 months for a few years now.