Real vs Displayed Power Consumption

[Cavalovoador]

I was exploring Bjorn Nyland youtube channel and I came across one of his videos where apparently he seems a considerable difference on what the car reports vs what the car really consumes.



Has anyone else experienced this?

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[hawkeye3point1]

He seems to overreact on efficiency. 20 kWh burn rate for 100 km = 3+ mi./kWh. That is not bad for highway speed.

His point about aerodynamics of the car holds water if you do a lot of 50+ mph driving.

I found his assumption that the GOM factors in charging losses interesting. That agrees with what I see when I calculate mi./kWh from real world driving data and power drawn from the grid.

Bottom line for me is that the MME is just as or more efficient than my Volt was, and that is saying something considering how much more it weighs.

 

[RedStallion]

I found his assumption that the GOM factors in charging losses interesting. That agrees with what I see when I calculate mi./kWh from real world driving data and power drawn from the grid.

My experience is different, my electric meter, which is only connected to the charger, shows quite significant discrepancy (15-20%) with the GOM.

 

[Nklem]

Ignore the GOM. Just use Mi/kWh and deduct 10% for charging losses from what you put in with Level 2 at 240V. Mine lines up exactly with what the car reports for Efficiency from the BMS data. Of course, the BMS data could be wrong too, but mine lines up well, draining to 0% and recharging to 100% was spot on.

 

[Mach-Lee]

At 240V the discrepancy should be less than 15% to account for charging losses. The car reports how much power went into the pack, not how much it drew from the wall. On 120V the discrepancy might be closer to 20%. If you are parked using the heater while charging you will also see a significant difference since the power for the heater isn’t counted. In my experience the car is pretty accurate with it’s power measurement.

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