Solar Power Feed-In Up 33 Percent in September – Renewables Up 9.5 Percent Year to Date
Münster, Germany – Solar feed-in in Germany rose well above the level of the same month a year earlier in sunny September. Feed-in from wind and hydropower was lower. This is shown by an IWR analysis of data from the European transmission system operators (ENTSO-E).
Solar Plants Feed In 8.55 Billion kWh in September, Wind and Hydropower Below Prior-Year Month
Solar power feed-in rose 33.0 percent to 8.55 billion kilowatt hours (kWh) in September (September 2025: 6.43 billion kWh). In addition to the sunny weather, this reflects the ongoing expansion of photovoltaics. Wind power feed-in fell 6.7 percent to 11.31 billion kWh (September 2025: 12.12 billion kWh). Feed-in from hydropower (excluding pumped storage) was 33.1 percent lower at 0.81 billion kWh (September 2025: 1.21 billion kWh). Together with biomass and geothermal, renewable energies fed in 23.43 billion kWh in September, an increase of 3.8 percent from the prior-year month (September 2025: 22.57 billion kWh).
On a monthly average, solar feed-in at noon in September was 38,486 MW (September 2025: 28,947 MW).
Image: Average feed-in output by energy source in Germany, September 2026 – © IWR
Sunny Weather Boosts Solar Power Generation in September
According to preliminary DWD analyses, the sun shone for around 192 hours nationwide in September. That is about 28 percent more than the 1961–1990 average (150 hours) and around 22 percent more than the 1991–2020 average and September 2025 (157 hours in each case). The south was particularly sunny: Baden-Württemberg recorded around 247 hours. In the north, Schleswig-Holstein reported the lowest state figure at around 129 hours.
The mean temperature of 15.9 °C was around 2.6 degrees above the 1961–1990 climate average (13.3 °C). This places September 2026 among the ten warmest Septembers since 1881. September was also marked by dry conditions. Nationwide, just under 40 litres per square metre fell on average, around 34 percent less than the 1961–1990 average and around 54 percent less than in September 2025 (just over 86 litres per square metre). Conditions were extremely dry in the southwest, while considerably more rain fell in the north.
Renewables Account for 63.7 Percent of Power Feed-In from January to September
Over the course of the year, renewable energies fed in 209.88 billion kWh from January to September 2026, according to the IWR analysis of ENTSO-E data. That is 9.5 percent more than in the same period of the previous year (191.71 billion kWh). The renewables share of total recorded feed-in stands at 63.7 percent (January–September 2025: 62.3 percent). Total feed-in across all energy sources grew 7.1 percent to 329.34 billion kWh (January–September 2025: 307.56 billion kWh). The main energy sources are wind energy at 98.29 billion kWh (January–September 2025: 87.71 billion kWh) and solar energy at 75.89 billion kWh (January–September 2025: 66.35 billion kWh).
Conventional feed-in rose 3.1 percent to 119.46 billion kWh from January to September (January–September 2025: 115.85 billion kWh). Power from hard coal increased 12.5 percent to 22.74 billion kWh, and feed-in from gas rose 2.5 percent to 41.25 billion kWh. Lignite fell 1.9 percent to 48.52 billion kWh. Waste added 4.91 billion kWh (up 26.9 percent) and oil 2.04 billion kWh (down 0.5 percent).
About the Data from the European Grid Operators (ENTSO-E)
The IWR analysis is based on country data provided by the national transmission system operators and reported to the European network of transmission system operators, ENTSO-E (as of October 1, 2026, preliminary). It covers net electricity feed-in to the power grids; quantities not fed in (own consumption, self-use) are not reflected in the statistics. Hydropower is reported excluding pumped storage. Gross power generation data in official annual statistics (e.g. Eurostat) can therefore differ from these timely measurements and extrapolations.
Source: IWR Online, 02 Oct 2026
