There are just soo many factors why the 'Energiewende' failed. It's because of the politics made. Eventually we would've running green already but once in a while Angela Merkel just stops a already running process, but then Fukushima happened and she made the decision to go 'all in' into green. But! She didn't actually. Most 'bigger' companies didn't even pay a cent more for the green energy, only the consumers or the main pillar (our middle industry) needed to pay the 'Energiewende'. That was freaking akward since the bigger Companies would've probably paid the biggest pillar of the 'Energiewende'.

The next part is storing energy or producing energy by yourself. Even if you bought a big sun collector you NEED to pay taxes for your energy produced (not just for the collector), also for the energy you will produce and use for your own goods and storing the energy will costs you taxes as well.

While maybe a lot of people can live with that, there was another thing, which is that building energy plants is regulated by our government. If you maybe are a rich guy and want to do something good, you can't since the plants are going through a really painful and akward regulation like a planned economy. Innovation won't win here since the government won't ever shutdown the last coal power plants since there is so much lobby going on when it comes to energy that even if you have a good idea how to solve the last problems (i.e. by innovating into battery grids or some other stuff) you won't succeed. The german government has their own plan, even when they need to raise taxes for all the consumers, they don't even care what happens with the prices on the market since the german consumer market is totally regulated.