Not every plug-in solar system (Steckersolargerät) hangs on a balcony. Hardly anyone mounts four modules on a garage roof or a house roof themselves. We do that for you.
The city pays €0.40 per watt of module power towards buying and installing one, for up to 800 watts per flat. That is up to €320, but never more than half the cost. Systems with up to 2,000 watts of modules and an 800-watt inverter qualify.
Important: apply before you buy or hire a company.
Sources: FKG: plug-in solar systems · FKG guideline, as of 28 September 2026
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