Italy added 3.35 GW of new solar capacity between January and July 2025, including 2.81 GW in H1 2025, says Italia Solare
Residential rooftop installations under 20 kW dropped 31% YoY, totaling 686 MW in H1 2025
C&I solar systems between 20 kW–1 MW fell 32% YoY, contributing 804 MW of capacity
Utility-scale projects above 1 MW grew 12% YoY, delivering 1.32 GW despite the overall slowdown
Lazio led installations with 420 MW, followed by Lombardy (358 MW) and Veneto (252 MW)
During the first 7 months of 2025, Italy added 3.35 GW of new solar PV capacity, according to local solar energy association Italia Solare. By July 30 this year, the country surpassed 2 million connected systems, reaching 2,011,056 installations with total capacity exceeding 40 GW (40,430 MW).
Residential connections rose from an average of 22 MW per month in 2020 to 140 MW in 2024, peaking at 188 MW in 2023 under the Superbonus scheme, points out Italia Solare. In the first half of 2025, new installations averaged 88 MW per month – still 4 times higher than pre-Superbonus levels – showing steady demand supported by falling technology costs, including storage, and greater awareness of solar’s economic benefits.
During H1 2025, Italy added 2.81 GW of new solar capacity, a 16% drop from last year. The figure is below 3.35 GW in H1 2024, with system installations down 33% year-on-year (YoY). Further dividing H1 installations into Q1 and Q2 gives 1.43 GW and 1.37 GW, respectively.
The slowdown is particularly visible in the residential and commercial & industrial (C&I) segments for systems under 1 MW capacity. There was a 31% YoY drop in the residential rooftop segment for system capacities below 20 kW, which totaled 686 MW of installations during the reporting period. C&I installations of 20 kW to 1 MW capacity contracted by 32% with 804 MW.
It was the utility-scale segment (system sizes larger than 1 MW) that registered a 12% annual increase with 1.32 GW.
Most of the capacity additions during the reporting 6-month period were seen in the Lazio region, which installed 420 MW, followed by 358 MW in Lombardy, and 252 MW in Veneto.
As of June 30, 2025, Italy’s cumulative installed solar capacity reached 39.87 GW, exceeding 40 GW by July 30, 2025, compared to 37 GW at the end of 2024 (see Italy Installed 6.8 GW New Solar PV Capacity In 2024).
Referring to the data of Italian transmission system operator Terna, the Italian solar energy association blames the H1 decline on lack of demand in the residential segment following the post-energy-crisis drop in electricity prices and an end to incentives – a trend also seen in several key European markets, as reported by SolarPower Europe (see SolarPower Europe: European Union To Install 64.2 GW PV In 2025).
“The first-half data clearly shows that the expansion phase of residential photovoltaics has come to a halt. The more than 30% drop in the number of installations cannot be ignored: it is a symptom of a period of regulatory uncertainty and a slowdown in investment, especially for families and SMEs,” said Italia Solare President Paolo Rocco Viscontini.
Nevertheless, the association says that new installations averaged 88 MW per month – still 4x higher than pre-Superbonus levels – showing steady demand supported by falling technology costs, including storage, and greater awareness of solar’s economic benefits.
He added, “The good news is that the utility-scale segment continues to grow, but that alone is not enough. A structural strategy is needed: stable tax deductions, simplified connections, and clear rules for the development of self-consumption systems and energy communities. We cannot afford to lose momentum just as the energy transition enters its most critical phase.”