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Old 02-22-2012, 11:35 PM   #9 (permalink)
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a constant 30 watt draw seems a little steep and that is what it would take to discharge the 56kw battery pack over 11 weeks, but still it should be part of ANY battery BMS to cut power if the voltage drops to low, that is a big part of the point of having a battery management system (BMS) so to allow that 30 watt draw to stay on all the time is odd... have a "power up" lag time if the car has sat for weeks without being charged! my electric car's controller draws 50 watts for a few seconds every few minutes and that is it to keep the controller powered up and ready to go on the spot, sitting over winter is not an issue and that is with a much smaller battery pack.
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