Europe¡¯s aging power grid and lack of energy storage capacity will require trillions of dollars in investments to cope with rising green energy output, increasing electricity demand and to avoid blackouts.

A week ago, Spain and Portugal lost power in their worst blackout. Authorities are investigating the cause, but whatever the findings, analysts and industry representatives say infrastructure investment is essential.

¡°The blackout was a wake-up call. It showed that the need to modernize and reinforce Europe¡¯s electricity grid is urgent and unavoidable,¡± Kristina Ruby, secretary-general at Eurelectric, Europe¡¯s electricity industry association, said.