This year, German consumers will pay a total of €20 billion for power from wind, solar panels and biomass — of which a staggering €17 billion is subsidy.

Earlier this year, BASF decided to build a new ammonia plant in the US because the American shale gas boom, which caused electricity costs to plummet and hence an industrial rebirth in the rustbelt states. Last Tuesday week Hariolf Kottmann, who runs BASF’s Swiss competitor Clariant, said he no longer had any reason ‘to invest a penny’ in Germany: ‘We had two or three projects planned. Now we prefer to invest in the United States.’ He said the renewable levy the firm was paying for its factory in Frankfurt-Höchst had almost doubled since 2011 — making energy twice as expensive as in China and America. And yes, he mentioned those two countries in the same breath.

As German companies know, things could be about to get worse. Germany has so far exempted manufacturing companies from most of their renewable subsidies. The European Commission has launched an investigation, and may now declare that this amounts to an unlawful state subsidy. If the exemption is removed, BASF says it would expect to pay an extra €400 million a year just for Ludwigshafen — a total which will, of course, only rise. A further 300 German manufacturing companies get the exemptions. What’s the point of eurozone bailouts if German industry, which survived the great recession so well, collapses?
http://www.spectator.co.uk/features/9078561/the-real-energy-scandal/

As long as they continue to be exempt.
If not, they will move elsewhere like BASF. And if jobs go elsewhere, there will be a much smaller pool of German workers to pay the taxes to cover 17 Billion euros worth of subsidies for every 20 billion euro worth of green energy.

Yes, if that's all there was to it.
However, they are carrying sub-Alpine Europe already. Weakening Germany further is costly to a lot of others as well.