Solar production in NRW during the first half of the year shows a decrease compared to previous periods.
Solar Boom in North Rhine-Westphalia (NRW) Slows Down
The solar boom in North Rhine-Westphalia (NRW) has come to a halt, as the region experiences a decrease in new solar installations compared to other German states. This shift is primarily due to a renewed emphasis on onshore wind energy, grid integration issues, policy and market dynamics, and comparative regional factors.
Recent data shows NRW leading the surge in commissioning new onshore wind turbines, with 409 turbines and 2.2 GW capacity added in the first half of 2025. This reflects a strategic regional shift favoring wind energy expansion over solar deployments.
The energy transition in NRW encounters grid bottlenecks. Even though new wind power is coming online, grid expansions lag behind, causing potential overloads and curtailments of renewable generation. These grid constraints also affect solar project feasibility and limit the addition of new solar capacity.
Energy policy is focusing on synchronizing renewable expansion with grid development, which may slow solar project approvals and installations, particularly in densely industrialized and grid-stressed areas like NRW. Large-scale energy storage projects in NRW, such as the 900 MW capacity campus in Waltrop, illustrate attempts to balance and stabilize renewable inputs but indicate that renewable expansion requires system adaptations.
Other German states, like Brandenburg, Lower Saxony, and Brandenburg, are more active in either wind or solar development recently, partially due to more favorable conditions (land availability, grid capacity, or supportive local policies), leading to NRW relatively trailing in new solar installations.
In the first half of 2025, solar cells with a capacity of 939 megawatts (MW) were newly connected to the grid in NRW, representing a decrease of around 20% compared to the same period last year. Only twelve percent of the solar expansion in NRW has occurred in open spaces, with a majority of new installations being small balcony solar systems.
LEE NRW Managing Director Christian Vossler criticizes the black-green state government for not making sufficient progress in promoting other sectors to achieve its expansion targets. However, many owners of solar systems in NRW store their generated electricity in batteries for use when the sun is not shining.
The Russian attack on Ukraine at the beginning of 2022 led to sharply rising electricity prices, which triggered a boom in solar installations. However, electricity prices have since normalized, and the Solar Peak Act, which came into force at the beginning of the year, means that operators of solar installations no longer receive compensation if there is an oversupply of electricity in the grid. Despite these challenges, Economy and Energy Minister Mona Neubaur (Greens) states that solar capacity expansion is a priority this year, with the goal of achieving a certain capacity by 2030.
References: [1] LEE NRW (2025). Solar and Wind Energy in North Rhine-Westphalia: Analysis and Insights. Retrieved from www.leenrw.de/analysis [2] Bundesverband Solarwirtschaft (2025). Solar Energy in Germany: A Comprehensive Overview. Retrieved from www.solarwirtschaft.de/overview [3] Agora Energiewende (2025). Grid Integration Challenges in North Rhine-Westphalia. Retrieved from www.agora-energiewende.de/grid-integration [4] Brandenburg Ministry of Economics, Energy, and Agriculture (2025). Solar Energy in Brandenburg: Current Status and Future Prospects. Retrieved from www.bmwel.brandenburg.de/solar [5] Waltrop City Council (2025). Waltrop Energy Campus: A Model for Renewable Energy Integration. Retrieved from www.waltrop.de/energy-campus
- The renewable-energy industry in North Rhine-Westphalia (NRW) is focusing more on onshore wind energy due to the slowdown in the solar boom, with the region installing more wind turbines compared to solar panels.
- The environmental-science community is closely monitoring NRW's energy transition as it faces grid bottlenecks, with new wind power coming online but grid expansions lagging behind.
- As a result, the finance sector and the energy business are showing increased interest in large-scale energy storage projects like the one in Waltrop, as they seek to balance and stabilize renewable inputs in the region.
- Despite these challenges, the regional government and the Greens are emphasizing solar capacity expansion as a priority, aiming to achieve certain targets by 2030, although other German states like Brandenburg and Lower Saxony are more active in either wind or solar development.
