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Electrical draw.

Thu Dec 07, 2017 11:10 am

Why does the charging system still draw 1200 watts after full charge has been reached?

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Re: Electrical draw.

Thu Dec 07, 2017 3:41 pm

Because it's likely that the battery's thermal management is working to either heat or cool the battery so the pack remains in an optimum temperature range for it's long term health. The battery's management may also be balancing the cells. This is normal.

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Re: Electrical draw.

Thu Dec 07, 2017 4:16 pm

I would like to think so but in a garage that is insulated i am not sure. A 1200 watt load will really impact someone electric bill if it goes 24/7.

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Re: Electrical draw.

Thu Dec 07, 2017 6:10 pm

I am assuming that you measured the 1200W draw, is that correct? How long did it go before dropping off? If OilerLord's hypothesis is correct, it shouldn't go on for too long before dropping to near zero. A 1200W load running 24/7 is absolutely not normal.

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Re: Electrical draw.

Thu Dec 07, 2017 8:57 pm

I have a meter upstream of my EVSE. The draw is zero when the car is fully charged. However I have only checked in the morning and an hour or so after I think it topped off, meaning I cannot vouch for how long it takes to stop spinning the meter.
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Re: Electrical draw.

Fri Dec 08, 2017 4:56 am

Cell equalization happens for almost an hour after the pack is more or less full, at least in other EVs. I suspect it's mainly the TMS, though.

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Re: Electrical draw.

Sat Dec 09, 2017 2:15 am

I've seen our Bolt call for power in a cold morning to condition the pack. This separate from preheating the car which also draws power.
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