I am designing an off-grid power system for a mountain cabin that is not used in the winter. The ambient temperature can get as low as -20deg F (-29deg C) during the winter. Due to snow and other environmental factors the system will be totally shut down during the winter months. I hope to use lithium ion batteries. I know I cannot charge the batteries at these temperatures, but can lithium ion batteries be totally disconnected and stored at -20deg F (-29deg C) without damage?
Note: I can set the charge level to whatever is appropriate before storage.
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