German Rooftop Solar Gets a Legal Rewrite — Installers, Payments and Permits All Shift
Published on 07/23/2026 at 05:52 | Redaktion boerse-global.de
Austria’s highest civil court has reclassified the legal nature of photovoltaic contracts, triggering a cascade of changes that affect how homeowners pay, who can install panels, and what happens to the electricity they feed into the grid.
The Supreme Court (OGH) ruled in mid-May 2026 that contracts covering both the supply and installation of solar systems are now considered unified service agreements — known legally as Werkverträge (case reference 5 Ob 145/25x). This applies whenever the system is individually designed and built to a customer’s specifications. The practical consequence is straightforward: payment falls due only after the entire installation is completed. The old model of paying in installments as equipment arrives, typical under purchase contracts, no longer applies.
Plumbers and Heating Engineers Get the Green Light
Meanwhile, a separate legal development in Germany has broadened the pool of tradespeople authorized to install solar panels. The Central Association for Sanitary, Heating and Climate Technology (ZVSHK) clarified in July 2026 that plumbers, heating engineers and even roofers are now permitted to carry out photovoltaic installations. The clarification follows a ruling by the Higher Regional Court of Koblenz on June 2, 2026. While the court acknowledged that PV work is a core activity for roofers and electricians, it ruled that other qualified trades are not automatically excluded. The association is now actively encouraging cross-trade partnerships.
Small Systems Get a Simpler Path to the Grid
New technical guidelines (VDE-AR-N 4105:2026-03), effective since March 1, 2026, have created a fresh category of “micro-generation units.” Homeowners can now register these small systems directly with their grid operator — without needing a licensed electrical contractor. This goes well beyond the existing rules for plug-in balcony solar devices.
Battery storage is seeing explosive demand. Westnetz, a major grid operator, reported around 116 gigawatts of storage connection requests in its service area as of July 2026. In response, the company introduced flexible connection agreements (FCA) in July for combined wind or solar-plus-storage projects. Instead of waiting for grid expansion, these agreements limit feed-in power through automated control systems.
Feed-in Tariffs Edge Down — and Disappear for New Systems in 2027
Starting August 1, 2026, the guaranteed feed-in tariff drops slightly. For systems up to 10 kWp, full-feed-in compensation falls to 12.22 euro cents per kilowatt-hour (from 12.34 cents), while partial-feed-in payments drop to 7.70 cents (from 7.78 cents).
A more fundamental shift is planned for 2027. New installations will no longer receive a permanent state-guaranteed tariff. Instead, they will get a transitional payment for 36 months, after which mandatory direct marketing kicks in. Only 50 percent of a system’s capacity may be fed into the grid. Smart meters and control boxes become compulsory. Existing installations are unaffected.
Storage Bans in Apartments Face Legal Challenge
A growing conflict is playing out in Germany’s rental market. Large housing associations are banning battery storage units for balcony solar systems, citing fire safety concerns. The problem, legal experts say, is that Germany’s civil code (Section 554 BGB) does not explicitly mention storage devices. The German Environmental Aid (Deutsche Umwelthilfe) is reviewing legal action against blanket bans. The TÜV technical inspection authority, for its part, says current assessments do not indicate a generally elevated risk.
On the commercial side, Power Purchase Agreements (PPA) are gaining traction, even as the overall market shrinks — it stood at 1.3 gigawatts in 2025. One notable deal: the drugstore chain dm signed a ten-year supply contract in July 2026 for 13 gigawatt-hours per year from a new solar park scheduled to begin operations in 2027.
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