Batteries in winter

[Kinger33]

I have a 2020 245rlsw, which has two batteries up front. As winter is going to descend upon us here shortly, I wonder what the best way is to keep the batteries from freezing and getting ruined.
Should I just leave it connected to shore power all winter, or is it better to take them out to a slightly warmer area in the house and attach trickle chargers?
is there some way to keep them warm either outside or inside?

[Grumpy]

Fully charge batteries don't freeze. I left our rigs plugged in 24/7 and never lost a battery over a 40 yr period in Ohio winters.

[Flyrotor]

I kept my batteries charged with a solar charger in Great Falls for 3 winters without removal from my trailer in open storage area, keep it plugged in and you will not have a problem

[Marine71-76]

We can't keep our unit on property & plugged in. And we do not have solar. We take all 4 batteries out, put them in carrying cases & sit on the garage floor, on top of a piece of wood. Come next spring, check them out & charge if necessary.

[Screwby]

Originally Posted by Grumpy

Fully charge batteries don't freeze. I left our rigs plugged in 24/7 and never lost a battery over a 40 yr period in Ohio winters.

This

[Jagiven]

Fully charged batteries will be just fine. If you chose to leave them on the TT, and not plugged in, make sure they are completely disconnected from any power drain. Best thing mark which wire(s) is what, and disconnect the power leads. You can leave the TT plugged in all winter too. If you do make sure to check the fluid level, if you need to add fluid, only add DISTILLED water, nothing else.

I remove my battery, and place it on a board on the floor of my garage. Usually I check them once or twice each winter. Usually in the spring they ares down 0.1 or 0.2 volts, but my batteries are now about 8 years old.

[JFlightRisk]

A fully charged battery with no parasitic draw is good to around -75* before the acid freezes. A discharged one only 32*, since the acid reverts back to water when discharged.

I pull ours out after winterizing, and put it in the cellar on a Battery Tender. It's 8 years old also.