Personally, not a damn cent. We went down to a single car after DH retired. A Chevy Bolt. A 100% Electric car. At the rate we drive now, I only need to charge it once every couple weeks...and then it is only down about half, usually. Rick figured that it costs between $3 and $5 to charge. We get between 250 and 300 miles of range on a full charge. I will charge it tomorrow, as weekends are off peak. To charge it from just under half charge to full takes about 4 hours. DH put in a 240 plug and got a heavy duty charging unit.
But, that being said, I drove by a gas station here in Western NY today, and gas was about $2.85 a gallon.