From what it seems, electricity costs less to travel, especially if you have cheap solar panels. However, you can get 100,000 miles of gasoline buying a 10,000$ car over a $20,000 electric plugin hybrid. $10,000 /(3$gallon)=3,333 gallons of gasoline * 32 miles to a gallon = 100,000 miles of travel. If an electric plugin hybrid car can get around $15,000 or less, then it will be a game changer for people who care about economy.