You are wrong. Here is the data from my solar panels on our house in London, UK. https://shkspr.mobi/blog/2021/03/1-year-of-edent_solar-we-are-100-offset/ http

You are wrong. Here is the data from my solar panels on our house in London, UK. https://shkspr.mobi/blog/2021/03/1-year-of-edent_solar-we-are-100-offset/ https://shkspr.mobi/blog/2021/03/1-year-of-edent_solar-we-ar... Over the whole year, we generate more electricity than we use. The panels need no maintenance. I guess we could wash them - but the English rain does that just fine. The inverter and panels all have long guarantees so, while they might break, there's no significant cost installed.