Spain’s government said Tuesday that the massive April power outage across Spain and Portugal that left tens of millions of people disconnected in seconds was caused by technical and planning errors that left the grid unable to handle a surge in voltage.

‘Multifactorial’ systems failure blamed for catastrophic power loss

MADRID: A major power outage that struck the Iberian Peninsula in April was caused by “overvoltage” on the grid that led to “a chain reaction,” according to a government report…