DC Fast charging prices are usually quite high (45-50 c/kwh and may well be near the cost of gas, but not all PHEV's support that. Level 2 charging is usually

DC Fast charging prices are usually quite high (45-50 c/kwh and may well be near the cost of gas, but not all PHEV's support that. Level 2 charging is usually much cheaper (20-30 c/kwh) though slower. So if you can charge at one of those (such as at work) it also works out to be cheaper than gas.