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