• MrFagtron9000@lemmy.world
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    10 months ago

    I live in a 1000 square foot two bedroom condo. When it gets below 20° f, which does a lot during the winter, I have to use the auxiliary heat on my heat pump unit.

    That’s 7.5 kW.

    So just to stay warm during the night, when solar stops working, I would need 3-5 Power Walls?

    • rusticus@lemm.ee
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      10 months ago

      Nice to meet you MrFagtron An EV would be a much better investment than powerwalls but it’s hard to be specific on a case by case basis. Hope that helps MrFagtron.

    • 31337@sh.itjust.works
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      10 months ago

      Get a better heat pump that doesn’t need aux heat? I know Mitsu “hyper heat” minisplits advertise high efficiency to -10F.

      Powerwalls are overpriced for their capacity. Grid storage operators pay ~$150/kwh for batteries, then I’d guess about the same for charging/inverter electronics. I also see EV West sells 3.5kwh Samsung batteries to average consumers for $700 (I’m sure they’re charging a large markup as well).