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.