Featured in Powering Through – 05-2025

Spain’s storage sunrise

Spain had more than 1,100 hours of zero- or negatively-priced electricity in 2024: more than 45 days. Despite this, battery energy storage systems (BESS) remain rare, with grid operator Red Eléctrica España (REE) recording just 3.36 GW of grid-connected energy storage, 3.3 GW of which was pumped hydro. A new capacity market and other policy tweaks may be needed to hit ambitious deployment targets.

By

Pilar Sánchez Molina

02 May 2025

Lawmakers in Spain face key decisions to facilitate further BESS deployment, according to local industry insiders. | Photo: Emnamizouni/Wikimedia

Energy storage could break through in Spain this year. Several recent announcements have motivated the sector. A capacity mechanism is being prepared by the government to secure grid supply, and Madrid is also drafting a grid flexibility market for 2025, which could include energy storage and electricity demand management.Auctions were held in late 2024 to …

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