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How big a solar battery do I need to store all my home's electricity?
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 …
It starts shortly after sunrise, peaks at midday, and gradually drops until sunset. What I want to do is find out what the maximum size battery I would need in order to store all of summer's electricity for use in winter. It doesn't account for increased energy use from having an electric car or moving away from gas heating / cooking.
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