AleaSoft Energy Forecasting, September 8, 2025. In the first week of September, weekly prices in the main European electricity markets fell compared to the previous week, with most markets below €75/MWh. On some days, most markets registered daily prices below €30/MWh, although prices in Italy and Germany exceeded €100/MWh. Wind and photovoltaic energy production increased in most markets, as did electricity demand. Photovoltaic energy reached the highest production for a day in September in the main European markets. On September 5, CO₂ futures reached their highest settlement price since mid‑February.
Solar photovoltaic and wind energy production
In the first week of September, solar photovoltaic energy production increased in the French, Italian and Spanish markets compared to the previous week, reversing the downward trend of recent weeks. The French market registered the largest increase, 6.3%, while the Spanish market registered the smallest rise, 1.1%. Italy registered a 4.7% increase. In contrast, the Portuguese and German markets registered declines in generation with this technology for the second and third consecutive week, respectively. Portugal registered the largest drop, 14%, while Germany reduced its production by 5.1%.
During the week, the main European markets reached all‑time highs in solar photovoltaic energy production for a day in September. In the Spanish market, this occurred on Thursday, September 4, with a generation of 192 GWh. One day later, on Friday, September 5, the French and Portuguese markets registered 131 GWh and 23 GWh, respectively, their highest daily generation values with this technology in a September. Finally, on Saturday, September 6, the German market reached 361 GWh and the Italian market 132 GWh of solar photovoltaic energy production in a September day.
For the second week of September, AleaSoft Energy Forecasting’s solar energy forecasts anticipate an increase in solar photovoltaic energy generation in the Spanish market and declines in the German and Italian markets.
Source: Prepared by AleaSoft Energy Forecasting using data from ENTSO-E, RTE, REN, REE and TERNA.
Source: Prepared by AleaSoft Energy Forecasting using data from ENTSO-E, RTE, REN, REE and TERNA.In the week of September 1, wind energy production increased in most major European markets compared to the previous week. Germany registered the largest increase, 60%, followed by France with a 38% rise, marking its second consecutive week of growth. Spain registered the smallest increase, 26%, extending its upward trend for a third week in a row. In contrast, the Portuguese and Italian markets reduced their wind energy generation. Portugal registered the largest drop, 15%, while Italy registered its second consecutive week of declines, cutting its production by 6.7%.
For the week of September 8, AleaSoft Energy Forecasting’s wind energy forecasts point to decreases in the main European electricity markets.
Source: Prepared by AleaSoft Energy Forecasting using data from ENTSO-E, RTE, REN, REE and TERNA.Electricity demand
During the first week of September, electricity demand increased in most major European markets compared to the previous week. The British market registered the largest increase, 7.2%, due to the recovery in demand after the Summer Bank Holiday celebrated on August 25. The German, Italian and Portuguese markets registered increases of 1.7%, 2.1% and 3.9%, respectively. Germany and Portugal continued the upward trend for the second consecutive week, while Italy accumulated three weeks of growth. The Belgian market showed the smallest increase, 0.8%, and maintained its upward trend for the sixth consecutive week. In contrast, the French and Spanish markets reduced their demand by 0.3% and 1.6%, respectively.
Average temperatures were lower than those of the previous week in all analyzed markets. Great Britain, Italy, Portugal and Spain registered the largest declines, ranging from 1.3 °C in Great Britain to 1.7 °C in Spain. Belgium, Germany and France registered the most moderate drops, 0.3 °C, 0.8 °C and 0.9 °C, respectively.
For the week of September 8, AleaSoft Energy Forecasting’s demand forecasts indicate decreases in demand in the Spanish, German, Portuguese, Belgian and French markets, while the British and Italian markets will register increases.
Source: Prepared by AleaSoft Energy Forecasting using data from ENTSO-E, RTE, REN, REE, TERNA, National Grid and ELIA.European electricity markets
In the first week of September, average prices in the main European electricity markets fell compared to the previous week. The Nord Pool market of the Nordic countries and the EPEX SPOT market of France registered the largest percentage price drops, 38% and 48%, respectively. On the other hand, the IPEX market of Italy and the EPEX SPOT market of Germany registered the smallest price decreases, 3.1% and 5.9%, respectively. In the rest of the markets analyzed at AleaSoft Energy Forecasting, prices fell between 7.7% in the N2EX market of the United Kingdom and 31% in the MIBEL market of Spain and Portugal.
In the week of September 1, weekly averages were below €75/MWh in most European electricity markets. The exceptions were the German and Italian markets, whose averages were €84.90/MWh and €106.46/MWh, respectively. The French market registered the lowest weekly average, €28.79/MWh. In the rest of the markets analyzed at AleaSoft Energy Forecasting, prices were between €43.61/MWh in the Nordic market and €74.46/MWh in the British market.
As for daily prices, on some days of the first week of September, the Belgian, British, Spanish, French, Nordic and Portuguese markets registered daily prices below €30/MWh. On Sunday, September 7, the French market reached the lowest average of the week among the analyzed markets, €13.24/MWh. That price was the lowest in the French market since August 6. In the case of the Spanish and Portuguese markets, on Saturday, September 6, the price was €26.54/MWh, their lowest daily average since June 16.
In contrast, in the first week of September, the German and Italian markets registered daily prices above €100/MWh on some days. On September 2, the German market reached the highest daily average of the week, €122.09/MWh. This was its highest price since July 2. However, on Monday, September 8, the daily price was even higher in the German market, €123.56/MWh.
In the week of September 1, the decline in weekly gas prices and the increase in wind energy production in most markets contributed to price decreases in European electricity markets. Additionally, electricity demand dropped in the Spanish, French and Dutch markets, while solar energy production increased in Spain, France and Italy.
AleaSoft Energy Forecasting’s price forecasts indicate that prices will rise in European electricity markets during the second week of September, driven by a drop in wind energy production. Furthermore, solar energy production will decrease in Germany and Italy.
Source: Prepared by AleaSoft Energy Forecasting using data from OMIE, EPEX SPOT, Nord Pool and GME.Brent, fuels and CO2
Brent oil futures for the Front‑Month in the ICE market reached their weekly maximum settlement price, $69.14/bbl, on Tuesday, September 2. This was the highest price since August 2. Prices then declined. As a result of these declines, on Friday, September 5, these futures registered their weekly minimum settlement price, $65.50/bbl. According to data analyzed at AleaSoft Energy Forecasting, this price was 3.8% lower than the previous Friday and the lowest since June 6.
Expectations of further production increases by OPEC+, along with rising US oil reserves, exerted downward pressure on Brent oil futures prices during the first week of September. On Sunday, September 7, OPEC+ agreed to continue increasing its production in October, although at a slower pace than in previous months.
As for settlement prices of TTF gas futures in the ICE market for the Front‑Month, they remained around €32/MWh during the first week of September. On Tuesday, September 2, these futures registered their weekly minimum settlement price, €31.77/MWh. In contrast, on Thursday, September 4, they reached their weekly maximum settlement price, €32.41/MWh. After a 1.4% drop from the previous day, on Friday, September 5, the settlement price was €31.97/MWh. According to data analyzed at AleaSoft Energy Forecasting, this price was still 1.1% higher than the previous Friday.
The abundant supply allowed TTF gas futures prices to remain around €32/MWh during the first week of September. European reserve levels continued to rise, getting closer to the 90% filling target set by the European Union for early November.
Regarding CO2 emission allowance futures in the EEX market for the reference contract of December 2025, on Tuesday, September 2, they registered their weekly minimum settlement price, €73.61/t. In the remaining sessions of the first week of September, prices increased. As a result, on Friday, September 5, these futures reached their weekly maximum settlement price, €76.03/t. According to data analyzed at AleaSoft Energy Forecasting, this price was 4.2% higher than the previous Friday and the highest since February 18.
Source: Prepared by AleaSoft Energy Forecasting using data from ICE and EEX.AleaSoft Energy Forecasting’s analysis on the prospects for energy markets in Europe, batteries and self‑consumption
On Thursday, September 18, AleaSoft Energy Forecasting will hold the 58th webinar in its monthly webinar series. The webinar will analyze the evolution and prospects of European energy markets, the progress and future of battery energy storage, as well as the current situation and expectations of self‑consumption. In addition, AleaSoft services for retailers will be presented.
At the analysis table of the webinar in Spanish, the guest speakers will be Xavier Cugat, BESS Technical Director at Seraphim, Francisco Valverde, independent professional for the renewable energy development, and Alejandro Diego Rosell, energy communicator and consultant, Director of Studies at World Wide Recruitment and Lecturer at EOI.
Source: AleaSoft Energy Forecasting.
