It depends on your location, power company, how many panels you put up, how much sunlight you get, and what type of energy storage you have.
Some jurisdictions and power companies allow net metering, which means you can sell excess power back to the power company when the panels are making more energy than you need which is then credited towards future bills, some don’t allow it.
It’s possible to put enough panels up to completely cover your electric needs, but you’d also need battery storage to provide power for when the sun isn’t out if you don’t want to use power from the electric grid during those times.
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