The green energy insanity is that bad, that over here everyone is forced or at least urged to place solar panels on their roofs. And then they deliver energy back to the system when the sun is shining.
But there are so much solar panels now that they shut down those expensive things on their customers roofs because the buffer in the network is full or overused or something like that.
And aside from that, the electricy that you've delivered into the system is detracted from your bill *without* the tax, even though at that point you are not a consumer but acting like the company in delivering energy and as thus, this tax should be delivered to the customer or the client also, which in that case would be the electricy company.
But they don't do that.
It is some kind of criminal scam. Like, that the electricity companies own the solar panels on your house. Even though you yourself installed and paid for them.
The only way to do this properly and to take matters into your own hands, is to go off-grid.
You also have the heat-pump thing that runs on water. Such a thing makes noise and is not exactly suited for the indoors of a house, and I've also been told that it needs its own separate room.
So think about what suits your needs and what is necessary in your case.
Having a generator running on wood isn't feasible if you don't exactly need or have to be burning expensive wood all year around. Aside from that, it'd increase deforestation, and we already have a lot of that happening on the world.