Ok, just tested my I charger with the 24 volt power supplies.
The power supply draws 6 amps or 702 watts at 117 VAC out of the wall while charging at a full 30amps.
Specs on generator:
Max Watts: 2000W
Rated Watts: 1600W
Rated Current: 13.3A
Looks like there should be plenty to run your charger and say....one more of your buddies i chargers if he gets in a pinch.