@AbbaS
“so electricity not used is lost.”
It is not lost, it does not disappear in thin air.
The excess electricity we generate goes to our local power company. Unlike your post’s assumption, they don’t buy it at the selling rate. They bank it and a running balance appears on out monthly bill.
So when we use power from the utility in bad weather, at night, etc. we are withdrawing KHW from our savings account.
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Generation by wind farms and hydroelectricity may be a better solution for a utility to produce electricity, but not for an individual. Our town’s zoning would never allow windmills of requisite height in the backyard of a home on a typical 1/2 acre plot. All windfarms and hydroelectric production do is reduce costs for utilities and cut down on fossil fuel waste. I am in favor of Nuclear production, but that’s for a utility not a homeowner.
Last year, we were guaranteed 30,000KHW production by the company who installed the solar on the main house in the compound (all our buildings have solar), we produced 47,000KHW. We have enough banked to carry us through a stormy winter. I love when I open the utility bill and it is only for the minimum $11.46, prior to solar this house bill was $650monthly in winter and $1300 in summer.