Not disagreeing. I live here (not a native). Germany needs to rethink it's policies. It should do the exact opposite with financing. Also, not borrowing when interest was low and when it had a lot of infrastructure needs means that it is now a lot more expensive than it used to be to fix things.

That being said, I think policy changes would stimulate a lot of companies and households to up their game on the energy front while benefiting from it.

A few policy changes could be done quickly and relatively cheaply that would stimulate that. But it seems Germany is being very hesitant and indecisive. Policy is the cheapest to do and the hardest to get done somehow. But it creates the context for investments to happen and for people to benefit from those investments.

By making renewable power expensive, it prevents people to benefit from investments already made. Which I agree is severely misguided. German credit rating is excellent. They could use that to stimulate their economy (which could use some stimulating) while fixing their infrastructure and lowering their cost of living. That all starts with sorting out policy and (counter) incentives.