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Joined 6 months ago
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Cake day: March 20th, 2024

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  • There are ‘hybrid’ heat pump mini splits (for air conditioning / cooling) that take both AC and DC input. (See airspool, EG4, and hotspotenergy)

    All of these are configured to have dc compressors and AC to DC inverters.

    If you have a hybrid system, you either take the conversion losses on the AC or DC input.
    For aircon, having the losses on AC to DC conversion makes the most sense - if it’s hot out, it should be bright out and there should be plenty of DC solar output - and topping off with a little AC and taking a loss should be fine.

    I don’t think this is the case with water heaters on average - if it’s cold and cloudy or night you’re still going to want hot water. I think it makes sense if you’re in the desert - but most people are not going to be. So don’t think this will be done commercially