Unreported World investigates the dirty business of cobalt mining in the Democratic Republic of Congo. The mineral is fuelling the planet’s green revolution, but at what cost?
It is of course hypothetical as I have not finished a system, but software these days is pretty accurate in determining the amount of sun your panels will receive and produce.
As soon as you turn your system on (assuming you have a space to place panels without a lot of shade) the electric bill reduces. If your area has net metering, you can zero out you bill entirely. Here we do have net metering, and in the example I gave, it would be a 15%/year return.