Tesla's offer of free, unlimited Supercharger access was supposed to have ended in early 2017, but it's been on a form of life support since then. Unless you were buying a regular Model 3, you could get the no-cost charging by ordering your EV with a referral code from an existing owner. Now, however, even that exception appears to be coming to an end. Elon Musk has pointed out that the referral program is about to end. After September 16th, owners will only get to hand out $100 in Supercharging credit to Model S, Model X and Model 3 Performance buyers -- just enough for a few top-ups.