Solar was E.U.’s biggest source of power for the first time ever in June 2025
At least 13 E.U. countries saw solar output hit a new monthly high in June, according to an analysis from energy think tank Ember. Solar amounted to more than 40% of generation in the Netherlands and 35% in Greece. Coal generated just 6 percent of electricity, a new monthly low. Fifteen E.U. countries are now coal-free, including Austria, Belgium, and Ireland. Analysts say that the June surge in solar power helped Europe weather a brutal heat wave, which saw temperatures soar upwards of 110 degrees F Analysts say that the June surge in solar power helped Europe weather a brutal heat wave.