As suggested, the charger/car didn't like the power for whatever reason. It was 15amp and 2200 watt continuous. Hooked it up to a larger 7000 watt generator and it's doing fine. Thanks!
So, I had my first 'pull over now' moment, which I tried to ignore since I was only 1mi away from home and juice. Made it safely off the road and into a driveway. Hooked up my standard 120 charger to a small generator (2200 running watts) and I can't get it to register 1mi of battery to get me...