Because the price of energy generation is only a small part of the cost: https://www.cleanenergywire.org/factsheets/what-german-households-pay-power https://www

Because the price of energy generation is only a small part of the cost: https://www.cleanenergywire.org/factsheets/what-german-households-pay-power https://www.cleanenergywire.org/factsheets/what-german-house... 50% are levies, fees and taxes, which partly pay for the built up of the renewable energy generation.