The main reason your EV is so cheap to run is that the government has not figured out how to properly tax it. That is coming with the new mileage tax.
My electric bill went up by 25% this past year. That trend will continue as more "Green Electric Power" is being pushed down our throats. By the way the amount of electricity being generated by coal has gone up over the past year.
Enjoy your "Cheap" EV while it lasts.