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 …
is it really easier and cheaper to store the energy needed for a home in a chemical battery?
Yes. A 5kwh battery is about 50kg and smaller than a carry-on suitcase. String 6 of them together and you’ve got 30 kWh stored with no moving parts. Anker has that for about $15,000, maybe $30k installed.
How much does a 3-story elevator cost? What about one that can capture the stored potential energy on the way down, and not break down?
Yes. A 5kwh battery is about 50kg and smaller than a carry-on suitcase. String 6 of them together and you’ve got 30 kWh stored with no moving parts. Anker has that for about $15,000, maybe $30k installed.
How much does a 3-story elevator cost? What about one that can capture the stored potential energy on the way down, and not break down?