In July 2026, renewables broke the 3 TWh “barrier,” setting a record for monthly production at 3,097 GWh. By absorbing 22.8 GWh of renewable energy that would otherwise have been curtailed, batteries prevented 13.6% of curtailments, which totaled 144.9 GWh in July (or 4.5% of total renewable energy production). Cumulatively over the first 7 months of the year, clean energy sources (RES and large hydro) reached a record high (22,348 GWh), exceeding fossil fuels by 6.6 TWh. There was a significant decline in oil (-38.8%) thanks to the Crete interconnection. However, gas remained at high levels (12,876 GWh, just 3.8% below last year’s record), and the wholesale electricity market price rose by 18.3% in July, reaching 110 €/MWh.
This analysis concerns electricity production across the entire territory of Greece and is based on the latest available monthly data from the Independent Power Transmission Operator (IPTO) for the interconnected grid (July 2026) and from the Hellenic Electricity Distribution Network Operator (HEDNO) for the non-interconnected islands (June 2026). In addition, we use data from HEDNO for low and medium voltage, as well as for the installed capacity of self-production systems (April 2026). Data from the Renewable Energy Special Account bulletin of the Renewable Energy Sources & Guarantees of Origin Operator (DAPEEP) (May 2026) are used to calculate more accurately CHP production at low and medium voltage, as well as for the PV utilization factors needed to estimate self-production. Finally, for the wholesale electricity market, we use data from the Day-Ahead Market from ENTSO-E. You can read in more detail about our methodology here.
July
In July 2026, renewables (primarily wind and solar, including self-generation) reached a record high for monthly electricity generation at 3,097 GWh, representing a 5.1% increase compared to June. Compared to July of last year, they increased by 8.3%.
Fossil gas ranked second with 2,176 GWh, marking the second-highest electricity generation of the year after January. Compared to the previous month, generation from fossil gas increased by 16.6%, while compared to last year, it decreased by 12.5%.
In third place, accounting for nearly one-fifth of gas, were large hydro plants with 452 GWh, an 8.9% increase compared to June. Compared to July of last year, large hydro plants increased by 10.6%.
Next was oil for the non-interconnected islands, with 314 GWh—up 39.6% from June but down 39.9% from last year, thanks to the new fully integrated interconnection with Crete.
Lignite came in last, with Ptolemaida 5 generating 179 GWh in July—a 38.2% increase compared to June, but a 45.1% decrease compared to July 2025.
Finally, large-scale battery storage systems absorbed a total of 37.7 GWh and fed 32.3 GWh back into the grid—more than double the amounts recorded in June.
Total domestic demand in July reached 6,011 GWh, up 23.6% from the previous month but down 6.4% compared to July 2025. Correspondingly, total domestic electricity generation reached 6,251 GWh, up 11.7% from June but down 5.4% from last year.
In the interconnection balance, the country recorded net exports of 239 GWh, down 67.4% compared to June’s exports but up 33.1% compared to last year.
The average price on the wholesale electricity market (day-ahead market) stood at 110 €/MWh for July, an increase of 18.3% compared to the average price in June.
Comparison with previous years – first seven months of the year
Cumulatively for the first seven months of 2026, renewables maintained the top spot with 18,149 GWh, setting a record for electricity generation during this period of the year.
Fossil gas once again ranked second with 12,876 GWh, down 3.8% compared to last year, when it had reached a historic high (13,389 GWh) for the seven-month period.
Large hydro plants ranked third with 4,199 GWh, marking the highest production for the first seven months of the year in the past twelve years.
Lignite followed with 1,584 GWh, down 8.9% from last year and reaching a new all-time low. Oil also reached a historic low at 1,284 GWh for the first seven months, down 38.8% compared to the same period last year.
After four months of operation, battery storage systems injected 57.5 GWh in total.
Domestic demand for the first seven months of 2026 reached 32,677 GWh, representing a 2.3% decrease compared to 2025. On the other hand, domestic electricity generation, at 38,160 GWh, increased by 10.9% compared to 2025.
In terms of the interconnection balance, the country set a record for net exports at 5,483 GWh for the seven-month period, nearly five times the net exports for the same period in 2025.
Source changes in demand coverage
Comparing the first seven months of 2026 with the first seven months of 2025, it can be seen that fossil fuels (lignite, fossil gas, and oil) decreased by a total of 1,481 GWh, with the largest decrease coming from oil (-814 GWh) due to the new interconnection with Crete. This amount was more than offset by the increase in renewable sources (+2,851 GWh) and large hydro plants (+2,327 GWh). Thus, the bulk of the increase in clean energy (renewables and large hydro), combined with the decline in domestic demand (-765 GWh), led to a massive increase in net exports (+4,250 GWh).
As for renewables, the increase recorded in the first seven months of the year appears to be attributable to both wind and solar power. Data on high-voltage systems show that wind power generation reached 6,963 GWh (+24.9% compared to 2025), while photovoltaic generation reached 3,542 GWh (+40.3% compared to 2025).
Comparison of clean energy with fossil fuels
In the first seven months of 2026, clean energy sources (wind, photovoltaic, biomass, self-production and hydro) with a total production of 22,348 GWh, reached a record high, representing a 30.2% increase compared to last year. Total production from fossil fuels (lignite, fossil gas, oil) was 15,744 GWh, down 8.6% compared to the same period in 2025, mainly due to the reduction in oil use. As a result, the difference between clean energy sources and fossil fuels reached 6.6 TWh, marking the highest historical difference in favor of clean energy sources. For the first seven months of the year, clean energy sources accounted for 68.4% of domestic demand and 58.6% of total domestic electricity generation.
Renewables Curtailments
Based on the combination of forecasts shown in IPTO’s integrated scheduling process (ISP2 & ISP3), RES curtailments in July are estimated at 144.9 GWh (or 4.5% of total RES generation), down 51.4% compared to June, but more than double the curtailments in July 2025 (58 GWh). Cumulatively for the first seven months of 2026, total RES curtailments are estimated at 1,746 GWh (or 8.8% of total RES production), 26.1% higher than in the first seven months of 2025. The day with the highest curtailments was Sunday, July 5, 2026, with 25.5 GWh, while most curtailments in July occurred between 9 a.m. and 3 p.m.
Battery Storage
According to forecasts shown in IPTO’s integrated scheduling process (ISP2 & ISP3), batteries in July absorbed energy mainly between 08.00 – 15.00 and secondarily between 00.00-04.00, while they delivered energy primarily between 16.00-23.00 and secondarily between 05.00-07.00.
In total for the month of July, batteries absorbed 39.5 GWh and injected 34.3 GWh to the system[1]. However, the same projections indicate that absorptions of 16.7 GWh occurred during hours when there were no RES curtailments. Given that total curtailments in July amounted to 144.9 GWh, it follows that the installed batteries prevented 13.6% of RES curtailments by absorbing 22.8 GWh that would otherwise have been curtailed, while fossil gas use was reduced by 1.6% due to the injection of 34.3 GWh.
Cumulatively, from April 2026, when the first batteries became operational, through July, batteries absorbed 70.2 GWh, of which 20.7 GWh occurred during hours without RES curtailments, while they fed 61.4 GWh back into the grid. As a result, they prevented 3.6% of total curtailments during this period, while at the same time reducing the use of gas for power generation by just 0.9%. Despite the progress observed in July—thanks to the increase in energy absorbed and the limited curtailments (compared to the previous month)—the data highlight the need to accelerate the installation of storage systems in the grid.
Hours with near-zero or negative DAM prices
Regarding hours with near-zero[2] or negative prices in the wholesale electricity market, July 2026 recorded 68.5 such hours, 78 hours less than the previous month but 57.5 hours more than July 2025. In total, in the first seven months of 2026, 857 hours with near-zero or negative prices were recorded, approximately 4.8 times more than the 179 such hours that occurred in the same period in 2025.
[1] According to the data in the IPTO monthly bulletin for the month of June, the batteries absorbed 37.7 GWh while they delivered 32.3 GWh to the system, quantities similar to those of IPTO’s daily ISP2 & ISP3 forecasts (39.5 GWh and 34.3 GWh, respectively).
[2] DAM prices lower than 0.05 €/MWh.
