Off the grid batteries and cold weather
I am planning an off the grid installation with solar panels, batteries, and an invertor with generator pass through for backup. The issue that I have yet to solve is this.... The installation is more than 1/3 mile from any existing grid power and is only frequented once a month in the winter. I can't think of any way to protect the batteries from the temperatures which are often below zero in the winter. The batteries will be left to charge in the intermitant winter sun which while scarce would be enough to maintain a charge but certainly not enough to heat the battery house.
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