Found this at: Alternative Fuels Data Center: Alternative Fueling Station Locator Combined CCS-1 and J3400 - adapters can add either CCS-1 or J3400 10,372 stations 43,329 charging ports CCS-1 has more locations, ~3.18x J3400 has more charging ports, ~1.55x That web site also handles other alternative fuels. Only propane comes close. Bob Wilson
