According to the latest data from Terna, the Italian transmission system operator, electricity consumption in Italy in 2025 totaled 311.3 TWh, essentially unchanged from 2024. Renewable sources covered 41% of demand, slightly below the 42% registered in the previous year, reflecting a combination of record solar output and a return of hydroelectric production to standard levels after an exceptionally wet 2024.
Photovoltaic generation set a new historical record, producing 44.3 TWh, a 25.1% increase compared to 2024. This growth was driven both by additional installed capacity (+6,636 GWh) and higher solar irradiation (+2,256 GWh). The peak monthly output occurred in June, reaching 5.7 TWh, 35.6% above June 2024 levels.
Wind power decreased slightly by 3.3%, while geothermal remained stable (-0.3%). Standalone storage units generated 1.5 TWh, confirming their growing role in supporting the integration of renewable energy. In total, Italy added 7.191 GW of renewable capacity in 2025, bringing the national installed capacity to 83.529 GW, including 43.513 GW of solar and 13.629 GW of wind. This exceeds the targets set by the Eligible Areas Decree for 2025 by 1.605 MW.

New storage installations increased by 1.743 MW, of which 723 MW were utility-scale, while smaller domestic storage systems slowed due to reduced fiscal incentives. Italy also held its first MACSE auction for electricity storage capacity in September 2025, assigning 10 GWh, covering 100% of the auctioned demand.
Electricity demand showed a two-speed trend in 2025, with lower consumption in the first part of the year followed by a recovery in the second half, supported by industrial demand. The Industrial Monthly Electricity Consumption Index (IMCEI), which monitors around 1,000 energy-intensive companies, recorded a slight overall decline of -0.7% for the year, with growth in steel, mechanical, cement-lime-gypsum, and food sectors, and declines in non-ferrous metals, chemical, transport, paper, ceramics, and glass industries.
Geographically, electricity demand increased slightly in the North (+0.1%), decreased in the Center (-0.4%), and fell in the South and Islands (-0.7%). National production supplied 84.9% of the demand, with the remainder covered by imports and exports. National net generation rose by 2%, while net imports fell by 8.1%, leading to a 4.6% increase in thermoelectric generation, despite a continued 13.5% drop in coal-fired production.
In December 2025, electricity demand reached 26,135 GWh, the highest since 2021, marking a +1.8% increase over December 2024. Adjusted for temperature and calendar effects, the growth reached +2.6%, with positive territorial trends: North +2%, Center +1.8%, South and Islands +1.4%. Renewables covered 27.5% of monthly demand, down from 32.5% in December 2024.
Terna’s monthly IMCEI index for industrial consumption recorded a +9.5% increase in December, with growth in steel, food, transport, and cement-lime-gypsum sectors, and declines in paper, non-ferrous metals, mechanical, and chemical sectors. The IMSER index for services also showed positive growth in October (+2.2%).
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