We have two Chevy Volts, using a SPX Power Express. I believe this draws at 24A. It's using a NEMA 6-30 plug (not directly wired in). I tried the J1772 adapter with the Model S, however it doesn't like it. It blinks a few times, and i hear a couple of relay clicks, and within 20 seconds the tesla charge indicator turns red. Has anyone else got this to work? Im charging at 120... but thats not going to work for very long. Unfortunately it does not appear that Tesla offers a 6-30 connector, either. Thanks for any input.