I am confident that I am the only poster that has data on their home's electricity consumption as my monitor checks usage 10,000 a second. I have over two years of data on this.
What no one understands is time of solar generation, time of consumption of electricity and the rates that you pay for electricity vice what you are paid for surplus.
Under no circumstances will a system that generates 15,000 KwH annually be a break even for a household which consumes 15,000. Even after not considering opportunity costs, loan costs or minimum fees by your utility.
It's simple, you pay 11.6 cents a KwH but sell surplus at 7.2 cents. You are helping your utility's profit by providing wholesale electricity at 2 pm to sell to your neighbor at 11.6.
No online calculator takes this simple math into consideration.
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