[_whiteCaps_]

Yes, sorry, I was in a rush and didn't explain enough. For our usage, the cabin isn't occupied during the winter, and can drop below 0*C occasionally. The solar system is turned off though, so we don't worry about it.

If you're permanently there, it shouldn't be a concern. Sounds like modern BMS can disable charging at low temperatures so maybe not a worry for you at all if you're buying new batteries.