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[–] 2 points 3 months ago* (2 children)

PS:
your user name sounds like you are from Denmark, but I don't see how you can drive a heat pump fully from solar in December January and February?

Our system can generate 14 kWh on the shortest day of the year, if it's a totally clear sunny day. We were lucky enough to have that 2 years ago. But we have days and days with heavy clouds where we generate jack shit. In normal cloudy weather in the summer we can make good power, but not in the winter.

We live 20 km north of the absolute most southern part of Denmark, so there shouldn't be anywhere in Denmark that is much better than here.

Edit:
Sorry you did write from March, but you also wrote you had free heat, but I guess that's from March too.

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  • [–] 2 points 3 months ago (1 child)

    Yes, Denmark - DK2 in the house! The free heat is "these days" as right now with lots of sun and not a lot of heating required (mostly floor heating in the toilets). Have only had the heat pump for a few weeks now so I am yet to see when we start using grid power because of the heat pump. We have used a little grid power for it but that has just been some odd times like initial heating of the buffer tank and water tank, and other times using lots of power on other stuff after sundown. When we see that pattern of power usage from the heat pump, we can see if bigger battery capacity would be feasible, however there is no way we can go all though winter on pure solar power + bigger battery capacity.

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  • [–] 2 points 3 months ago

    there is no way we can go all though winter on pure solar power

    Sorry that was me misremembering something you wrote.
    We are currently using wood pellets that are still twice as expensive as they were before the gas crisis.
    Everybody on our road has switched to heat pump now, so it's a bit embarrassing that we haven't switched yet.
    We used to be 5 houses that bought wood pellets together. Now we are alone. 😥

    But my guess is the upcoming season will be the last where we need to buy wood pellets.

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