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 …
To be completely off grid you would ideally want to be able to go at least a week with minimal to no power generation. Personally that would mean I would need at least 100kWh of batteries.
I would also then want/need a petrol generator powerful enough to power everything that would usually run in a normal day, so that meant be a 15000W one which would be very expensive.
To be completely off grid you would ideally want to be able to go at least a week with minimal to no power generation. Personally that would mean I would need at least 100kWh of batteries.
I would also then want/need a petrol generator powerful enough to power everything that would usually run in a normal day, so that meant be a 15000W one which would be very expensive.