I had solar panels put on the roof last year. They produce lots of power, even on overcast days. The Government has offered a substantial rebate for a battery. The battery stores excess power, to use overnight or if the power goes off. I’m able to see, on the iPad how much I’m producing and how much i use.
Cookie, my DS has just updated his inverter and added more panels . He now doesn’t pay for any electricity and even covers the charge to bring power to the property through the excess that he sells to the grid. Yesterday I had 2 lots of visitors for tea and cake. The second visitor was interested in my recipe for Xmas Puds so we did a taste test. I didn’t need any Dinner.