Winterizing lithium batteries

I would charge them to 13.2V (70%) and then disconnect them.

The Li dealers appear to recommend only 50% state of charge for storage.

Li hate being float charged, so turn off all sources of charging.

Freezing them is ok so long as there are zero parasitic loads.

Make sure they are well above freezing before charging in the spring.

Storage at 100% SOC isn’t recommended by any RV Lithium battery manufacturers that I know.

Pretty much all the manufacturers seem to state that storage down to 0 or even -20F is fine, but do not charge if below 32F. The more sophisticated lithium chargers will automatically shut down at 32, but to be sure, I'd disconnect them. That also eliminates the vampire loads that many campers seem to have.

Steve thanks but would the core freeze if they are left outside?

rhodedog98 wrote:
How do I winterize my lithium batteries or do I have to. The temperature is starting to drop at night. I read if fully charged they only lose 3% per month.

charge to about 90% and turn them off or disconect the battery cables from them..

Steve