Charging an electric car is already much cheaper than paying for gasoline, notes alternate vehicle webmag Green Car Reports, but free charging can be even more attractive. Ford is exploring that appeal in California and Maryland for buyers of its 2016 C-Max Energi plug-in hybrid. The company’s EV 1-2-3 Charge card grants free access to more than 500 public charging stations for three years after the date of purchase. Once activated, it can be used for charging the C-Max tall wagon at participating stations across California and Maryland. With an EPA-rated electric range of 20 miles, the C-Max Energi uses a 2.0-liter four-cylinder engine for propulsion and to generate electricity when it’s not running on battery power.