Germany has still one of the highest electricity and energy prices among developed nations which tremendously hurts its industrial base. That has to change too unless this cannot really be called a success I think.
Germany's electrical prices are mostly in line with it's neighbours, not super high. If a company makes good usage of batteries, they could actually have quite low prices since the electrical price undergoes huge swings throughout the day. All spring through fall the spot price goes to or near zero at midday almost daily.
Throughout the winter, wind is a bit more random but causes spells of high prices and spells of low prices.
The main thing causing electrical usage prices to be high in Germany is grid charges for the gigantic grid infrastructure buildout.
Germany's electrical grid is one of the most resilient and interconnected in the world, and it's rapidly being upgraded to accommodate the huge build-out of wind, solar, and batteries that is underway. I agree that the government should probably shoulder more of these grid-costs to take some burden off of major industrial users.
The further we go down the renewables route the less we depend on despotic states for our energy.
Energy may well be cheap in the US but you have been paying for that for decades through military misadventures in the middle east.
For that to change they need to not depend on expensive power plants (such as coal, gas, etc.), the bidding process for the electricity market in the EU will price the 15-minute window kWh price to the most expensive source providing power to the electricity zone being supplied.
Unless there's a revolution in this pricing mechanism the only way for Germany to lower its electricity prices is through renewables build out to push away the more expensive sources.
They are also one of the few nations with high export to import ratios. If it is weighing down industry then it is a great loss factor in the race against china.
Ember Energy: European electricity prices and costs - https://ember-energy.org/data/european-electricity-prices-an... (updated daily)
The problem with electricity for industrial use is, that you also need electricity during long, dark, cloudy winters, when there is very little solar power available. Somehow all the "green" supporters are all afraid of nuclear powerplants for some reason and instead prefer coal, even though there's more radioactive crap going into the air from that than from nuclear plants.
The electricity prices for the industry are around the same since 2014: https://www.bdew.de/service/daten-und-grafiken/bdew-strompre...