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?
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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.