Yes, slightly off-topic, but I can't think of anyone better than Mehdi or someone else on this sub to answer.

I live fully off-grid and finally (FINALLY) got my inverter connected into my house. But I wonder about what units I should be using to keep track of just how much electricity I have available to me. The (nominal) system is:
a solar panel array structured in a 48VDC, 2100(ish)W (nine strands, each about 230W@48VDC) configuration
a battery bank structured in two parallel strands of batteries, each strand having 480AH @ 48VDC for a total (nominal) capacity of 960AH@48VDC, or 46080WH
a 15000W@120VAC output, 48VDC input inverter
a house that takes that 120VAC input and uses it to spit out all sorts of stuff like light, heat, water, cooked food, shelter, etc, etc, etc.

I know amperage = watts/volts, so the panels produce (nominally) 43AH/hour, and the inverter outputs a maximal 125A instantaneously (not that I actually USE that much at any time, but that's the limit), and obviously as long as I'm using fewer amps than I'm pushing into the batteries I'm golden, right? But is a 120VAC amp the same as a 48VDC amp? The AC amp is 120W, while the DC amp is only 48W. Should I be making _everything_ in my maths watts, or is an amp the way to keep score?

Help me Mehdi-wan Kenobi, you're my only hope! (of maybe ending up on LaTiTY) :)