Been dealing with this myself over the past few winters. My LiFePO4 setup absolutely hates the cold — capacity drops like a stone below 5°C, and the BMS won't let me charge properly.
Currently...
Got two Drifts feeding my off-grid cabin setup for about two years now. Dead reliable, proper solid build quality. Only thing—they're hefty to move about, but that's lithium for you.
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