I thought you might enjoy this:
If it is the Honda that I think it is a very good genny and designed to run computers etc so should be a very stable power sourceI don't know. The original EVSE supplied with the Ampera was switchable to 6A so if it can supply 1500W continuously it might. My concern would be any start up load that might go over.
I have a smaller genny (can't remember the power) but I'll try it sometime.