220V at 30A? Good lord, man, where did you find this thing?
You weren't kidding when you said:
However, this isn't your average UPS. It's a 300lb monster that is capable of feeding nearly 4000 watts of power even when unplugged.
Readster, I would typically agree with you (see my post at the beginning of this thread), but the specific unit that Ritz is using is clearly
not a typical residential UPS.