• sunbeam60@lemmy.one
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    8 months ago

    You’re talking ROI. I’m talking efficiency. SHW is about 65%-70% efficient. PV is about 20% efficient.

    • Blaat1234@lemmy.world
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      8 months ago

      Efficient with money means you get more of that world and environment as savings per dollar.

      Would you choose paying €4000 to replace 600 kWh of heat pump boiler hot water with solar boiler, or 4000 kWh of basically a whole home’s energy usage including hot water?

      The solar boiler doesn’t even heat well during all seasons, mine still uses gas to back it up at least half the days.