jjeff wrote:GerryAZ wrote:The J1772 standard goes down to 6 amperes at anywhere between 120 and 240 volts (probably down to 100 volts, but I don't have the standard in front of me). The later versions of EVSE Upgrade units are adjustable down to 6 amperes at any voltage. You could use a 1.5 kVA transformer to drop the voltage from 220 to 110 and use an EVSE Upgrade unit set at 6 amperes to charge with your generator. I actually do the opposite. I have a 3 kVA transformer that I use with my 3 kW Honda generator which operates at 120 volts to charge the car at 12 amperes and 240 volts with my EVSE Upgrade unit in emergencies (or to run the generator periodically under load).
Not that you'd probably want to spend more money, but you could also just get an EVSE that would output full amps(27.5) @ 120v
I have several EVSEs that will do that, allowing me to fully utilize up to a 120v 3300w continuous generator. In your case with a 3000w generator you should be able to charge at ~24a @ 120v with your generator, avoiding the losses of your transformer(and also having to lug around what I'd have to believe might be a heavy?? transformer.
One scenario where I could see your transformer being handy would be with one of the old(pre '13) Leafs that maxed out at 12a @ 120v and I'm thinking the post '12 S Leafs without the charger package may also have the 12a 120v limitation, but I'm not sure of that. With those you should be able to almost double your charge rate with your transformer.
I bought the transformer when I had the 2011 which would draw a maximum of 12 amperes at 120 volts regardless of EVSE pilot signal so it did double the charging rate on generator for that car. The transformer is heavy (probably about 50 pounds), but it has a 3-wire 120/240-volt output so I can use it for a lot more than just charging the car. I would have purchased a 120/240-volt generator if an inverter model with lots of sound insulation had been available back when I bought my Honda EU3000is.