Hmmm... I think you've caught me. I was thinking of amplitude of voltage and current, but it's certainly 110V rms, and actually probably 20A rms for fuses so you can multiply them. So you CAN pull 2000W average and so you can get those 2 hours of battery life for 6 minutes spent charging at maximum current.

Well at least that's an interesting number to know. And.. good thing they haven't given me my degree yet