PV4EV
Member
But my kw/h cost is also much higher: 0,23€ (~0,30 $). Off hour price is not considerably less. A Modell S would save me only about half my diesel costs but the sticker price is about 20k € more than my (fully loaded) 320xd. For me, the ROI is negative....
I've just done some quick figures on the back of an envelope, and sure enough if you are charging during the day and paying the very high rate of 0.2E / KwH then the cost per mile of an average EV really is only half that of Diesel car as you say - I didn’t realise they were that close. (I've assumed the 320xd does approx 50mpg, and that an EV does approx 300w/mile.)
It sounds like you have excessive electricity rates though. What does the utility company charge at night time rates ??
Here in UK, my own day rate for grid electricity is approx 14p / KwH, and the nigh time rate (1am to 7am) is 5.9p / KwH. So, for reference and using the same assumptions, an EV charged at night time is still 1/6th the cost of running an efficient Diesel.
And if you compare it to the cost of an average petrol car doing 25mpg then the EV is 1/12 of the cost .
… and having a property with > 3Kwp of PV, and the benefit of feed in tariffs payments, it would mean that running the EV will cost 0.0, or less than zero per mile :smile: