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Effects of Communication Protocol on Bolt EV Charging Efficiency

5108 Views 5 Replies 4 Participants Last post by  Jeff N
Someone was kind enough to point out to me that Tesla and CHAdeMO equipped cars actually use a different communication protocol than the Bolt EV (CAN bus versus IEEE.1901 respectively).

My question is, could that affect charging efficiency? I know that CAN has to run through the car's ECU, but I'm not sure whether that would add additional parasitic losses. This question is probably more loaded and involved than I think, but I thought I'd ask anyway.

*I just noticed that we actually have a dedicated "Charging" forum. Please move this post if that is more appropriate.
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I would think it would more depend on what is or has to be powered up to accept the charge... Which is probably were Ladogaboy was going.
I wish I had the answer. I don't have the cars at my disposal so you could test "draw" when charging - if that is even possible in an EV/EREV. I used to test power draw when the car was off to see if I ha a phantom power draws in my cars that the batteries would seem to die quickly in. Make sure aftermarket items hooked to the accessory fuses were actually turning off, etc...

My guess is that the computers that have to run draw so little power, it probably makes a statistically insignificant amount of difference. A battery warmer/cooler turning on or HVAC pre-conditioning will of course reduce charging rate. Considering in the Volt, running the HVAC in a remote start causes a drain on the battery on 12A, L1 charger.
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