I think the efficiency of burning coal for electricity still has a carbon advantage to burning grossly over subsidized gasoline. Using electricity also saves taxpayers money, nobody ever takes that into account. Anyway, to answer your question, my solar PV system produces an average of 22kWh a day, that's average. This time of year the panels produce only 13kWh a day, during the summer months that number is around 30+kWh. That said, I produce more juice than I use, but I sized my system to account for future consumption considering I will have my Empulse (hopefully) soon, and possibly another EV within the next 5 years or so.
The beauty of an EV is that you can run it on anything that can be harnessed or burned to create electricity.