So I'm trying to calculate how much my model Y is costing in electricity and my math is telling me it's much more than advertised. So here in NJ, according to my last PSE&G bill, my electric supply costs is .13 per kWh and my electric delivery costs is .05 per kWh. So total is .18 kWh. My odometer is now 5483 miles. According to TeslaFi, which I've been using since the beginning, I've used 2389 kWh which costed me $431. Comparing to a fossil car, $431 would buy me about 172 gallons of gas @ $2.50/gal. 5483 miles / 172 gallons gives me only 31 miles per gallon. Even if I assume perfect 100% charge efficiency and use 1970 kWh for the math, it would have cost $355 instead. That buys me 142 gallons and still gives me only 38 mpg.
Why is my Model Y as efficient as a gas powered Toyota Corolla? Is my math wrong somewhere?
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