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Planning my 12v system for my van. It's an old red cross ERV. I have 412 AH of SOK lithium batteries already but haven't purchased anything else. I am planning on a rather large solar array, as my vehicle is huge (112 square feet) and I would like to maximize the space with panels on the roof...

I have three 206AH SOK batteries wired in series. I haven't been working on my build, so I turned the power system off as it started to get cold. I wasn't charging, batteries were at about 13.2 V when I turned everything off as it was too cold to charge. They sat for about a month, temps in MI...