J1772 is not a charger, it is just a source of AC power. The car and the wall unit talk back and forth and come to an agreement. The car and wall unit tell each other how much power they can take, if the connector is actually plugged in, and the wall unit doesn't energize the cord until the everything is in agreement. You can charge an Alta SM from a J1772, with an adaptor, since it has an onboard charger, but not the EX or MX. You could use the same adaptor to power an EX or MX charger, but you would need to have the charger with you. Not sure on the Stark. If it has an onboard charger then possible with an adaptor. No onboard charger, then you need an adaptor and a charger.