For the first time in a single month, solar generated 25 percent of the European Union's electricity, more than any other source.
Solar generated a quarter of the European Union's electricity in June, the first time it has passed 25 percent in any single month. Output reached 52 terawatt hours, a terawatt hour being roughly the electricity a million homes use in a month, and that was more than any other source produced across the bloc, beating nuclear, which supplied 21 percent.
How we know
This is only the third month in which solar has been the EU's largest single source of power, so it is a threshold being crossed rather than a settled new order. The pattern is clearest in the south, but not only there: Spain took solar past a third of its power for the first time, at 34 percent, Germany reached 36 percent in June, up from 33 percent in May, and Poland, still one of Europe's heaviest coal users, reached 24 percent.
Why it matters
The honest framing is that June flatters solar: it has the longest days and the strongest sun, so a June record is the easiest record for solar to set, and a monthly figure is not an annual one. The harder problem is the rest of the year, when output falls and the gap must be covered by storage, grid capacity and firm generation not yet built at the scale required, so the right reading is a real milestone in a system with its hardest work still ahead, worth marking without pretending winter is solved.
June is solar's best month of the year, so this is a monthly record and not an annual share. Output falls sharply in winter, and covering that gap still depends on storage, grid capacity and firm generation that has not yet been built at the scale needed.
Does this mean the EU now runs mostly on solar?
No. This is one month, and June is solar's strongest month by a wide margin because the days are longest. Solar has been the EU's largest source in only three months ever.
Was solar really bigger than nuclear?
Yes, for that month. Solar supplied 25 percent of EU electricity in June against nuclear's 21 percent, making it the largest single source for only the third time.
Which countries drove the record?
Spain passed a third of its power from solar for the first time at 34 percent, and Germany reached 36 percent in June, up from 33 percent in May. Poland, a heavy coal user, reached 24 percent.
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