The local Walmart in Garden Grove, CA has just installed two D.C. Charging stations, each with two parking places. I do't see either a credit card or currency slot, so could they be free? Don't know, but they offer the two worldwide D.C. Formats with the twist of a dial. (There are 2 separate trigger thingys on each unit) I think we are seeing the start of a very big trend: mass EV adoption. If you're ordering a new Bolt, pay the extra and get DC capability.