Valle d’Aosta is the most efficient region in producing electricity from solar energy, followed by Emilia Romagna and Piedmont. This is established by a study conducted by Aceper (Association of Consumers and Producers of Renewable Energy), an association comprising 10,000 renewable energy production plants, with over 7,000 members and a total installed capacity exceeding 2 GWp. The study was conducted on a sample of 5,236 photovoltaic plants in 17 Italian regions.

A region is considered more or less efficient based on the ratio between actual photovoltaic production and expected photovoltaic production, where the expected production is estimated according to the official measurement tool PVGIS (Photovoltaic Geographical Information System).

According to Aceper’s ranking, Valle d’Aosta leads as the most virtuous region with 960,391 kWh (kilowatt-hours) actually produced and an expected production, according to PVGIS measurements, of 1,011,502 kWh, resulting in a ratio of 95% between actual and expected production. The national average is 65%.

Emilia Romagna takes the second spot, with 37,939,525 kWh produced and 43,840,630 kWh expected (87% ratio), followed by Piedmont in third place with 139,917,414 kWh produced and 162,741,031 kWh expected (86% ratio), although it ranks first for the amount of kWh produced from solar energy.

Next, there are three regions with an 85% ratio: Abruzzo, with 20,100,052 kWh produced and 23,625,127 kWh expected; Liguria, with 5,187,522 kWh produced and 6,108,499 kWh expected; and Lombardy, second in the ranking for solar energy production with 66,305,239 kWh produced and 78,089,977 kWh expected. Veneto follows, with 49,221,066 kWh produced and 58,691,563 kWh expected (84% ratio), ranking as the third Italian region for production.