Solar panels in Zaragoza, Spain. Fernando Tomás via Flickr For the first time, solar was the largest source of electricity in the EU last month, supplying a record 22 percent of the bloc’s power.At least 13 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 percent of generation in the Netherlands and 35 percent in Greece.Nuclear was the second biggest source of electricity across the bloc, followed by ...