Spain's grid operator denied on Wednesday dependence on solar power was to blame for the country's worst blackout, while Prime Minister Pedro Sanchez came under increasing pressure to explain what went wrong.

New details are emerging, which is why a large-scale blackout occurred in Spain, which lasted more than 10 hours and hit millions of Spaniards. The statements of the operator of the country's energy system differ from the original version of

In response to a power outage in Spain and Portugal, the U.S. Department of Energy’s secretary Chris Wright tried to blame the use of solar and wind energy, though the cause of the blackout is not yet