Adverse wind conditions hamper the generation of renewable electricity
In the first half of 2025, Germany's renewable energy sector has shown resilience, with the share of renewable energies in gross electricity consumption remaining steady at around 54%. This stability, despite a 5% drop in total renewable electricity generation compared to the previous year, can be attributed to two key factors: the strong expansion and growth of photovoltaics (solar energy), and relatively stable overall electricity consumption.
While wind and hydro generation declined due to weak wind conditions in winter and spring, solar power output increased significantly. Photovoltaics, which has more than doubled since 2016, saw a 27% increase in electricity generation. This growth, coupled with continued capacity expansion, helped partially compensate for the lower wind and hydro output.
The stability of overall electricity consumption also played a role. As the share of renewables is a ratio of renewable generation to gross electricity consumption, a moderate drop in renewable generation can still result in a steady percentage share if overall electricity demand does not increase significantly.
The exceptionally low wind conditions in early 2025 caused a decline in wind power generation, which is the dominant renewable source in Germany. However, the onshore wind buildout showed strong growth with new permits and capacity increases, which will support future output.
The surge in solar PV production occurred especially during sunny periods, occasionally causing oversupply and even negative electricity prices in grid markets. This underscores the need for improved grid flexibility and storage solutions to ensure a balanced energy system.
In terms of specifics, wind energy accounted for around 43% of renewable electricity production, followed by photovoltaics (34%), biomass (17%), and hydropower (6%). Hydropower electricity production also decreased by 29% due to very dry weather conditions.
The net addition of onshore wind energy installations in the first half of 2025 was 1.9 GW, double the amount of the previous year. In the transport sector, around 23 TWh of renewable energy was used, marking a 6% increase compared to the first half of 2024. Approximately 3.7% of the renewable electricity generated in Germany in the first half of the year was used in the transport sector.
Government measures are underway to accelerate renewable infrastructure across multiple sectors, including heating, which will improve the integration and contribution of renewables in the energy system over time. The forecast for the full year 2025, however, remains uncertain due to the uncertainties of weather influences and the further development of electricity demand.
- The growth in photovoltaics, an integral part of environmental science, has significantly increased its electricity generation by 27%, contributing to the stability of Germany's renewable energy sector in the first half of 2025.
- In the business sector, notably the energy industry, the surge in solar PV production during sunny periods has led to occasional negative electricity prices, emphasizing the importance of implementing improved grid flexibility and storage solutions.
- The environmental-science implications of Germany's successful renewable energy strategy are far-reaching, as the transport sector saw a 6% increase in the use of renewable energy, reducing its dependence on fossil fuels and contributing to efforts in fighting climate-change.
- As the financial landscape evolves, government measures focused on accelerating renewable infrastructure across multiple sectors, such as heating, will not only enhance the integration and contribution of renewables in the energy system but also open avenues for increased investment in the environmental-science and renewable-energy fields.
