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well.. I guess water and rocks, at a scale that make them useful for other purposes will definitely have a size problem for most people. While a battery (espec
by nunodonato 7y ago
well.. I guess water and rocks, at a scale that make them useful for other purposes will definitely have a size problem for most people. While a battery (especially the new lithium ones) can fit in a drawer :)
- WalterBright 7y agoYour dwelling, just as it is, has a lot of thermal mass that can be used as a "battery". For example, cooling it to the low end of the comfort zone when electricity is cheap, and letting it drift to the high end when it is expensive. For example, the power goes out around here often. I've noticed it can take up to two days for the house to cool down. The water in the hot water tank is hot enough for a comfortable shower for 3 days. Water/rock batteries are cheap as dirt, no maintenance, no fire risk, etc.