Zelestra and EDP have signed two new power purchase agreements (PPAs) to hybridize operational solar plants in Spain with battery storage, adding around 462 MWh of battery storage to 181 MWdc of operational solar capacity. The agreements take the companies' partnership to four hybrid projects and more than 1 GWh of contracted storage in the country.

Two Agreements Add 462 MWh of Storage to Operational Solar Plants

The long-term agreements cover the Pedroso plant in Seville and the Valkyria plant in Castilla-La Mancha. At Pedroso, Zelestra will develop a 25 MW battery energy storage system (BESS) of approximately 100 MWh alongside the existing 31 MWdc solar plant. At Valkyria, a 90.45 MW BESS of approximately 362 MWh will complement 150 MWdc of solar capacity. Both systems have a four-hour duration.

EDP, which is the existing offtaker for both solar plants, is building a leading position in the offtake of battery storage assets in the Spanish market.

A Partnership Built on a Series of Firsts

The two new agreements bring the hybridization partnership between the companies in Spain to four projects. In 2025, EDP and Zelestra signed the country's first combined solar and BESS PPA, covering 170 MWdc of solar capacity and 400 MWh of storage at Trujillo, Extremadura.

Earlier this year, the two companies signed Spain's first PPA to hybridize an operational solar plant, adding a 160 MWh BESS to the 50 MW Pizarroso plant in Cáceres.

Together, the four projects represent more than 1 GWh of storage, making the Zelestra–EDP relationship the most extensive contracted hybrid solar-plus-storage portfolio announced in Spain to date under the partnership.

Why Hybridizing Operating Plants Matters

According to the announcement, hybridizing plants that are already operating is one of the fastest routes to a more flexible Spanish grid, because the land, the grid connection, and the generation are all already in place. This allows storage capacity to be added without the lead times associated with entirely new projects.

Jaime Burguete, CEO of Zelestra in Spain, said the partnership had built something unique in the Spanish market. "Zelestra and EDP have built something together that is unique in the Spanish market: a commercial partnership that is unlocking large-scale storage capacity that will benefit the wider energy system," he said.

"These four hybrid projects show that energy storage is bankable in Spain, and we expect this segment of the market to be the main growth area in the years ahead. It also means that every megawatt-hour moved into the evening or early morning is clean power the system would otherwise have had to find elsewhere."

EDP Sees Storage as Central to Decarbonization

Pedro Neves Ferreira, CEO of Global Energy Management at EDP, said the company's approach to innovation goes beyond deploying renewable generation. "At EDP, innovation goes beyond deploying renewable generation. We are continuously developing new solutions that combine technology, market expertise and flexibility assets to unlock greater value from clean energy," he said.

"By integrating storage with renewable generation, we can enhance system resilience, improve efficiency and accelerate the electrification and decarbonization of the economy."

The Wider Context for Zelestra

The announcement comes amid a broader run of storage activity for Zelestra. In May 2025, the company signed a major BESS agreement with Sungrow for 1 GWh of energy storage at the Aurora hybrid project in Chile.

In September 2026, Salzgitter Flachstahl and Zelestra signed the largest hybrid solar-plus-energy-storage contract in Germany to supply green electricity for low-carbon steel production.

In Spain, the company's work with EDP has progressed steadily: the Trujillo agreement was signed in July 2025, followed by the Pizarroso hybridization PPA in April 2026, and now the Pedroso and Valkyria agreements were announced on October 5, 2026.

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