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 …
I don’t need to get through winter, I just need to get from dusk to when the cheap energy is starts. Currently that’s about 4kwh - or a small portion of my car battery before or recharges on the cheap rate.
I don’t need to get through winter, I just need to get from dusk to when the cheap energy is starts. Currently that’s about 4kwh - or a small portion of my car battery before or recharges on the cheap rate.