average conversion runs about 5-7 thousand dollars, the measurement is an AMPs not horsepower, one guy had an old toyota electic that had what looked like a volume control button, he just turned up the juice and had more power, i think the car ran an 11.7 in the quarter mile, at a standard setting you can drive the car about 400 miles before you need a recharge. if you solar shingle your roof, you can charge your car and power you house in fl and have enough power leftover to sell back to the grid. imagine that, no parts. just new tires and new batteries every 5 years. and no more gas! cities need these things avail now, can you imagine LA with a clear blue sky ?