Germany's planned EEG reform will fundamentally reshape the framework for photovoltaic projects. From the gradual phase-out of traditional feed-in tariffs to mandatory direct marketing and stronger requirements for grid integration and energy storage, the changes expected from 2027 will have significant implications for EPCs, project developers, planners, and asset owners.
Germany's energy transition is entering its next phase. With the planned reform of the Renewable Energy Sources Act (EEG), policymakers aim to align the expansion of renewable energy more closely with grid capacity, market mechanisms, and overall system costs. For EPCs, project developers, engineering firms, and plant operators, this could mean substantial changes. Now is the time to prepare for the evolving regulatory landscape.
What Is the EEG?
The Renewable Energy Sources Act (EEG) has been the central policy framework supporting renewable energy deployment in Germany since 2000. Among other things, it regulates:
• Feed-in remuneration for electricity generated from solar, wind, and biomass plants
• The marketing and sale of renewable electricity
• Expansion targets for renewable energy
• Competitive auctions and market premium schemes
The EEG has played a key role in making solar and wind power economically viable and accelerating the energy transition.
Why Is the EEG Being Reformed?
The current state-aid approval of the EEG by the European Union expires on 31 December 2026. At the same time, renewable energy is accounting for an ever larger share of the electricity system.
The reform aims to strengthen market integration, improve grid compatibility, and increase cost efficiency. While Germany remains committed to achieving at least an 80% renewable share of electricity consumption by 2030, future expansion is expected to be more closely coordinated with grid development.
What Changes Are Currently Planned?
1. Gradual Phase-Out of Traditional Feed-In Tariffs
The most significant change concerns the long-established guaranteed feed-in tariff.
For new installations commissioned after the reform takes effect, the current 20-year guaranteed remuneration is expected to be phased out gradually. Direct marketing of electricity will become the standard model, while smaller PV systems may continue to receive temporary transitional support.
2. Direct Marketing Becomes the New Standard
In the future, operators of new renewable energy systems are expected to market their electricity directly rather than relying on fixed remuneration schemes.
The objective is to strengthen the integration of renewable generation into electricity markets. Operators will assume greater responsibility but may also benefit more directly from favorable market prices.
3. Greater Focus on Grid Compatibility
Alongside the EEG reform, the German government is working on measures to improve grid connection procedures and better align renewable expansion with available grid capacity.
In regions experiencing congestion, additional requirements may emerge. Grid connections are also expected to be designed more efficiently, while measures to limit generation peaks become increasingly important.
4. More Competitive, Market-Oriented Support Schemes
Larger renewable energy projects are expected to rely more heavily on auctions and market-based support mechanisms.
In particular, Contracts for Difference (CfDs) are expected to play a growing role. These mechanisms can provide investment certainty while limiting excessive profits during periods of exceptionally high market prices.
When Will the Changes Take Effect?
The draft legislation was approved by the German Federal Cabinet in July 2026 and is currently progressing through the legislative process.
The reform is expected to be adopted by the end of 2026, with the government aiming for implementation on 1 January 2027, subject to parliamentary approval and the necessary authorization under EU state-aid rules.
What Does This Mean for EPCs and Project Developers?
Economic assessments will become more complex. Instead of relying on guaranteed remuneration levels, future project evaluations will increasingly depend on:
• Electricity price forecasts
• Direct marketing strategies
• Battery storage integration
• Demand-side management
• Grid connection concepts
• Power Purchase Agreements (PPAs)
Projects will increasingly need to be designed as integrated energy systems. The combination of photovoltaics, battery storage, and intelligent energy management is likely to become a key differentiator.
What Does This Mean for Engineering and Planning Firms?
Engineering firms will need to focus not only on energy generation but also on system integration. Key questions will include:
• What level of self-consumption can be achieved?
• What storage capacity is economically optimal?
• How can grid bottlenecks be mitigated?
• Which energy marketing strategy fits the project best?
As a result, flexibility and grid compatibility will move to the center of project planning.
What Does This Mean for Asset Owners?
For existing installations, there is good news: Current indications suggest that existing remuneration agreements will remain protected and continue unchanged. For new systems, however, the economic landscape is changing:
• Self-consumption becomes more valuable.
• Battery storage becomes more attractive.
• Electricity marketing becomes an integral part of the business model.
• Revenues become more dependent on market prices.
At the same time, new opportunities emerge for operators who integrate flexibility, storage solutions, and intelligent energy management into their projects.
Success Will Depend on Thinking Beyond Generation
The EEG reform marks a fundamental shift in approach: away from supporting individual generation assets and toward creating a more market-oriented, system-focused energy landscape. For the solar industry, this means greater complexity, but also significant new opportunities.
Future success will require viewing photovoltaics not merely as a source of electricity generation, but as part of an integrated ecosystem that combines energy production, storage, market participation, and grid interaction.
For EPCs, planners, and asset owners alike, the key question is no longer how much solar energy a system can generate, but how intelligently that energy can be stored, managed, and monetized.