I can't get my head around question about energy consumption, energy supply and run-time. I think I forgot (Im sure I forgot) something in my equation. I am trying to find a way to calculate for how long could UPS supply my PC I dunno why I can't find Amp-hours of UPC on it but let's assume it's 1500Ah and my PC consumption is 150W. I tried to do some digging first I found some explanations but none of them made sense to me I feel like it can't be so complicated. Or when I found easier equations it didn't make sense (the result). could anyone give me answer?