Quote:
Originally Posted by Conissah
We can do some basic math.
Let's run it off the 2023 Chevy Bolt which has a 65kW battery. Let's also assume you're at 10% charge, which means you have 6.5kW stored. 80% of 65 is 55.25kW, a differential of 48.75kW (let's just say 49). A crappy charger will be around 70% efficiency, so to charge that 49kW you will actually use 63.7kW. My average cost per kW is around $0.13, so multiply that by 63.7 and we get $8.28. If we went from 10% to 100% assuming the same 70% efficiency, it would be a 58.5kW differential which would actually consume 76kW and would cost $9.88. These are rough numbers.
HOWEVER, something else to consider is when you actually charge. If it's at peak times, the kW rate is much higher, and if it's in the middle of the night (which is when we charged our EV) it's MUCH lower, sometimes half. We left our EV plugged in almost constantly, and in the car we just set a charge timer so it would only charge between 10pm and 7am.
ALSO something to think about, range degredation due to cold weather. Our EV sat outside, and during the winter we lost ~30% total range just because the battery was cold. In our Bolt that was a reduction from 240 miles down to 170... While ICE vehicles lose some MPG during cold weather, it's nowhere near 30%.
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Good point, cold weather is one achilles heel of an EV, 30% loss is massive and causes worry when away from home when it's chilly.