Cold weather batteries


New Member
Lead acid are still the best for Temps down to -40 degrees f I have 6 rolls 550 batteries and have 3 -100 watt panels mounted vertically on my camp wall so as not to collect snow keeps batteries warm all winter.


Happy Breffast!
Not arguing the point. I'm just noticing some issues:

6X 550 in 2S3P for 12V, 1284Ah?

If so, you're doing them harm. The Rolls manual cautions against charging below 0.05C as it can encourage sulfation.

300W/15V = 20A - well below the minimum 64.2A Rolls recommends.

If you're just storing them, fine, that's more than enough to float them, but I hope you're using temperature compensation.

I'm curious how they're being kept warm. FLoating with 300W of solar isn't going to contribute significantly to their warmth.