My retired father with too much time on his hands has got himself some solar panels.
He has 30 high capacity batteries in the garage and 24 solar panels on the roof and another 6 on the house.
He was telling me that in peak sun he is producing over 30kw per day.
He has this fancy system that can sell it to the grid but he doesn't, he sends it to his batteries and they keep the house topped up during the day and run the house overnight. The batteries are second hand from a backup radio system and are unused and cost him a fraction of their original cost.
He has a wood stove with a back boiler and has never had gas over the last 30 years as it's connected to his heating/hot water system. He has some land and tree surgeons use it as a tip for their tree waste which he then burns. For the summer he uses solar water heating when his stove isn't in use.
Last year I ended up plastering all the external walls in my parents house as he put insulated plaster board on the walls as its 100 years old with solid walls. The downside is the front room where the stove is now slowly cooks them throughout the winter evenings.
He's spent about 8k doing it all and is soon to be effectively off grid. Once he is sure he has sufficient battery capacity he will have the electric cut off and have no energy bills whatsoever.
The mind of a retired engineer!