A domestic hot-water tank fitted with a heat pump, with a coefficient of performance between 2.5 and 3.5. For the same hot-water need it consumes about three times less electricity than a resistive tank — and therefore absorbs about three times less solar surplus.

Also known as: heat pump water heater, thermodynamic water heater

Source: SPW Logement

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Solar panels: profitability and surplus — Decide whether to install based on your situation, then choose what to do with the electricity you do not use.

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