Superchargers should be supplying 170 miles of range per 30 minutes as per the Tesla site. Supercharger | Tesla Motors However, I've recently been reading about the actual speeds various UK supercharger are giving out, to be much lower than expected. I've have previously read stuff that says rates can be all over the place for various reasons. Any thoughts into why rates are varying so much? Outside temperature, time of day, multiple users, supply issues? When planning a long drive recharge times are a very important factor. Would any of you lucky UK people to have used a supercharger please reply telling us which charger you used and what speed you really got. What number do we report slow superchargers to?