I already have a 240v, 20amp outlet in my garage.
I did the SPX online survey which asked if I had 40amp and when the electrician came he said that I needed to upgrade to 40amp because with 20amp it would take 11 hours to charge.
The unit I'm getting is the SPX Voltech and I think this is the correct install instructions http://gm-volt.com/forum/register.ph...11ebb73cf90e94 which calls for 20amp and actually warns against going bigger.
I dont want to pay for something I dont need (93' of new cable run, breakers, labor) so what I'd like to know is if I'm being fed a line about the 40amp requirement.
Is anyone running this charger on a 20amp circuit and getting 3-4 hour charge times?