How do watts, watt-hours, etc. relate to voltage, current, and resistance?
I've worked with 12v and 5v a fair amount, and I've got a good understanding of Ohms law, series and parallel circuits, etc. But, I get a little sketchy when it comes to wattage ratings, KWHs, etc. and their relation to (now) my electric bill, (but hopefully soon to my off-grid, alternate power sources/power banks) and what I can handle as far as power consumption, etc.
Any theory, links, book suggestions, practical examples, etc. will be GREATLY appreciated.
Thanks so much in advance, everyone!