The delays in power supplies reportedly left the Iberian peninsula vulnerable.
In Carvalho's opinion, insufficient connection of the French and Spanish energy systems does not let Portugal enter the European energy market, the paper said.
A large-scale power outage occurred on April 28 across almost the entire territory of Spain at 12:30 (10:30 GMT). The failure also affected Portugal, France and Andorra. Due to the blackout, all rail services had to be stopped. It also affected public transport in cities where traffic lights did not work. Queues formed in supermarkets, and people had to be rescued from stuck elevators. All nuclear power plants in the country were safely shut down. The cause of the blackout is being investigated.