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Boston area Sprinter camper van, parked outdoors all year, with pretty cold winters. In order to best protect the batteries, should I leave the BMS on to manage the battery function or should I turn all the fuses off to avoid any drainage or charging? Should the batteries be fully charged or drained? Any advice on heating pads? Thx
Charge (or discharge) the battery to about 70% SOC then disconnect all consumers, including the BMS. The cell voltage at rest should be about 3.3V.
How low can the temperature get?
