coffeeri parent
It is the result of an energy dependence on Russia that has been built up over years, not due to any specific subsidiaries.
That could explain it if prices were high in general (i.e. also for industry).
https://de.statista.com/statistik/daten/studie/152973/umfrag... shows that 2014-2021 over six cents per kWh were going to the renewable energy subsidy scheme, and this is directly attributable, not some kind of hand-waving. I believe this was more than the wholesale cost of the electricity (without grid fees and taxes) in many of these years, and I think you also have to add another 19% of VAT on top of that.
In 2022 the subsidy started to be paid from taxes instead, and it was lower because market-based electricity prices went up (reducing the amount of subsidy necessary to reach the guaranteed prices).