http://www.teslamotors.com/goelectric#savings This cost calculator ignores all charging losses. Verify that for yourself by setting the cost per kWh to $0.10, set miles per year to 10K - see that your total cost is $283. Then read the 283Wh/mile disclaimer at the bottom. The EPA, on the other hand, reports 380Wh/mile on the sticker, yet gets 265 miles of range. Assuming Range mode is 95% of 85kWh, that's 265 miles on 80.75kWh, or 305Wh/mile. The difference, 75Wh/mile is all charging losses. Now, I suspect that one reason this is so high is that charging in Range mode forces extra battery cooling, which consumes power. Does anyone know what the penalty is when charging in Standard mode? I might guess the loss is under 50Wh/mile - but does anyone have a dedicated meter or done something with a ChargePoint to know for sure? At any rate, Tesla really should be more honest about the costs. After all, even though it's 25% more power needed, that's only about a penny per mile.