on EV + PV

Free gas!

Yes, you can fuel your car for free -- if you invest in home solar and an electric car! How? You pay upfront for your solar 'gas station', allow it to reach so-called 'solar payback' the point in time at which the money you spent on the solar system = the amount you would have paid to a utility for your electricity, a point typically reached after five to 10 years in the United States, then you've got free gas for the lifetime of your solar gas pump which = 10, 15, even 20 years.