I have a modest set of solar panels on an entirely ordinary house in suburban London. On average they generate about 3,800kWh per year. We also use about 3,800kWh of electricity each year. Obviously, we can't use all the power produced over summer and we need to buy power in winter. So here's my question: How big a battery would we need in order to be completely self-sufficient? Background …
How ? Is it just AC ?
We oscillate between 300 and 800kwh per month and it’s with an old water heater, an electric car charged at home, a dryer and electric oven.