3 ms·
It's called pumped storage. It exists, but only at larger scales than a household system. It's ~80 efficient. http://en.wikipedia.org/wiki/Pumped-storage_hydro
by xxgreg 13y ago
It's called pumped storage. It exists, but only at larger scales than a household system. It's ~80 efficient.
http://en.wikipedia.org/wiki/Pumped-storage_hydroelectricity http://en.wikipedia.org/wiki/Pumped-storage_hydroelectricity