My brother has a 6-50 outlet in his shop that I used for charging. We failed to check the fuses first and an hour after I started charging, the fuses blew and shut things down. Since it was Christmas Eve, I had to wait another day and a half to find a store that sold the right fuses. We replaced them and then I charged at 32 amps instead of 40 amps and didn't have any problems after that.