Leroy wrote on May 5
th, 2025 at 2:57pm:
https://corporate.dw.com/en/fact-check-was-the-iberian-blackout-caused-by-too-mu...Claim: "Renewables, in this case solar, have just caused the first major #power outage in Spain, specifically due to an oversupply of solar," an alleged physicist with a German account, posted on X, formerly Twitter, garnering almost 100,000 views (as of 30.04.2025, 16:40).
The user refered to Fritz Vahrenholt, a German chemistry professor and manager, who is critical of energy transition efforts and had explained in another post on X, which attracted more than 400,000 views, that before the grid failure in Spain, the production of renewable energies, especially solar, had increased more than demand.
DW fact check: UnprovenThe cause of the power outage has not been conclusively clarified. It is correct that at the time of the blackout, solar energy provided around 60% (19.3 GW) of the power available in the Spanish grid. Moreover, it appears that solar power plants dominated electricity production in the southwest of Spain.