Masdar, Endesa start €25.2 million battery build in Spain

Summary

• Masdar and Endesa began construction of three battery storage projects in Spain on 5 November 2026.
• The €25.2 million portfolio bolts batteries onto existing solar plants in Extremadura and Andalusia.
• It is the partners' first storage venture, extending a 2024 solar deal into stored power.

The latest

Construction has started on three battery energy storage projects attached to operating Spanish solar plants, a combined €25.2 million investment by Abu Dhabi Future Energy Company (Masdar) and Spain's Endesa. The companies said work began on 5 November 2026 and the sites are expected to be operational by the end of 2027, adding 60.16 MW of capacity and 120.34 MWh of stored energy.

Details

• The numbers: The three projects carry a combined investment of €25.2 million and will deliver 60.16 MW of storage capacity alongside 120.34 MWh of stored energy, according to the companies. The roughly two-hour duration ratio places the assets in the short-cycle category used to shift midday solar output into evening demand hours.
• The sites: The Ardila project sits at the 44 MWp solar plants in Fregenal de la Sierra, in the province of Badajoz, Extremadura. La Vega I and La Vega II are being built at two solar plants in the town of Teba, in the province of Málaga, Andalusia.
• The model: Rather than standalone grid batteries, all three are co-located with solar plants already in operation, according to the companies. Retrofitting storage onto existing generation reuses the grid connection and site infrastructure of assets the partners already own.
• The partnership: These are the first storage projects under the Masdar-Endesa partnership, which was formed in 2024 when Masdar acquired a stake in Endesa's Spanish photovoltaic portfolio. The move marks the first expansion of that tie-up beyond solar generation into stored power.
• The timeline: The partners put commissioning at the end of 2027, giving the three sites roughly two years from groundbreaking to operation. No interim milestones for individual projects were disclosed.
• Not disclosed: The announcement did not break the €25.2 million down by project, name the equipment suppliers or contractors, or set out how the investment is split between the two shareholders. Nor did it specify the revenue model the batteries will operate under.
• The footprint: The three sites spread the portfolio across two Spanish regions, Extremadura and Andalusia, both in the country's sun-rich south. Badajoz and Málaga provinces host among the largest concentrations of installed solar capacity in Spain.

Background

Masdar, the Abu Dhabi state-backed renewables developer, entered the Spanish market through Endesa, one of Spain's largest utilities and a unit of Italy's Enel. Their 2024 transaction gave Masdar a stake in an operating photovoltaic portfolio rather than greenfield projects.

Between the lines

The decision to attach batteries to plants the partners already own, rather than build standalone storage, points to a strategy of raising returns on existing assets instead of expanding the portfolio. With the solar capacity already generating and grid connections in place, the €25.2 million buys the ability to move output to higher-priced hours. The absence of a disclosed revenue model leaves open whether the batteries are aimed at merchant trading or grid services.

What's next

Watch for commissioning of Ardila, La Vega I and La Vega II by end-2027, and for whether Masdar and Endesa extend storage to other plants in the photovoltaic portfolio acquired in 2024.

Source: Masdar