Quote:
Originally Posted by 01tundra
Your internal heater draws power from your battery to heat.
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Incorrect, it only kicks on when charger is above 15A as the 300AH battery requires that current to run the heating. At that point it is not charging it is just using the charger to heat the battery until it reaches temperature then the BMS allows charging.
A lithium battery can be drawn down in colder temperatures just needs much management to charge in colder temps.