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BrtByte | 27 days ago

An 85% round-trip efficiency and 4X smaller volume sound great, but how does the installed cost compare to just oversizing a hot water tank or running the heat pump harder during off-peak hours?

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labcomputer|27 days ago

That’s essentially what they’re doing. The innovation is an engineered material having a specified temperature of phase change.

So the temperature swing is smaller (almost zero) so heat losses due to non-infinite insulation are reduced.