Total solar generation that year, including estimated small-scale photovoltaic generation, was 388. Ember (2026); Energy Institute - Statistical Review of World Energy (2025) – with major processing by Our World in Data This dataset contains yearly electricity generation, capacity, emissions, imports and demand data for European countries. On average, a residential solar panel installation generates between 4,000 to 10,000. Modern Solar Panel Output: In 2025, standard residential solar panels produce 390-500 watts, with high-efficiency models exceeding 500 watts. Global solar photovoltaic capacity has grown from around 40 gigawatts in 2010 to approximately 2. 7 terawatt-hours (TWh) in the United States.