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

Spain is grappling with its most severe blackout, sparking a debate over the role of renewable energy and grid stability. As Prime Minister Pedro Sanchez promises an investigation into the outage, both political and energy sector leaders dispute the causes,

Spain’s grid operator has denied that solar power was to blame for the country’s worst blackout, as Prime Minister Pedro Sanchez faces increasing pressure to explain what went wrong. Red Electrica de Espana (REE) on Wednesday said the source of the outage had been narrowed down to two separate incidents of loss of generation in substations in southwestern Spain,