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Welcome! By making the data available on this website, it is our intent to promote transparent and objective discussions relating to all factors regarding the energy transformation.


The raw data are retrieved by Fraunhofer Institute for Solar Energy Systems ISE scientists from numerous sources on an hourly or daily basis and processed for presentation.

Net Public Electricity Generation in H1 2025: Solar Power on the Rise Across Europe

Press Release
Bruno BurgerBruno Burger
02 July, 2025

The Fraunhofer Institute for Solar Energy Systems ISE has published new data on net public electricity generation for the first half of 2025. Despite record-breaking solar output, the share of renewable energy dropped to 60.9 percent compared to 65.1 percent in H1 2024 — mainly due to reduced wind power generation.

Europe sets solar power records

Photovoltaic systems fed 40.0 TWh into Germany’s grid — a 30 percent increase from the previous year (H1 2024: 30.7 TWh). Many other European countries also reported record solar generation: France rose from 11.3 to 15.1 TWh, Belgium reached 5.6 TWh (2024: 4.1 TWh), Poland increased from 8.8 to 10.3 TWh, and Denmark grew to 2.3 TWh.

Wind power generation down

Despite the decline, wind power remained Germany’s most important source of electricity, generating 60.3 TWh — significantly less than the 73.4 TWh recorded in H1 2024. This brought wind’s share of net public electricity generation down to 31.6 percent. Prof. Bruno Burger of Fraunhofer ISE explains: “That’s about 6 percentage points lower than in 2024, simply because there was less wind than last year.”

Across the EU, net public generation from wind and solar dropped from 358.1 TWh (H1 2024) to 344.4 TWh in H1 2025.

Electricity imports: Scandinavian wind and hydro cheaper

Germany imported a net 7.7 TWh of electricity in H1 2025, slightly less than the 9.2 TWh imported in H1 2024. Electricity was imported primarily from Scandinavia, France, Switzerland, Belgium, and the Netherlands. Exports were directed toward Austria, the Czech Republic, Luxembourg, and Poland. Imports were favored due to low prices for wind and hydropower in Scandinavia, which undercut the production costs of domestic coal and gas plants.

Electricity prices stabilize

Volume-weighted day-ahead auction prices increased slightly after sharp drops in 2023 and 2024 — from €67.94/MWh in H1 2024 to €86.64/MWh in 2025. For comparison: the price in H1 2023 was still €100.54/MWh. Prices were particularly high in January and February 2025 due to low wind output, while June saw a low of €56.46/MWh — the lowest level since May 2021.

Electricity prices for new household customers in Germany averaged 27 ct/kWh in June 2025 — returning to summer 2021 levels.

Gas and CO₂ certificate prices rise

The price of natural gas in H1 2025 was higher than in H1 2024. CO₂ emission certificate prices also increased by 11 percent compared to the first half of 2024.


Press release from July 2, 2025 (in German):

https://www.ise.fraunhofer.de/de/presse-und-medien/presseinformationen/2025/nettostromerzeugung-im-1-halbjahr-2025-solarstrom-europaweit-auf-dem-vormarsch.html