Iberdrola builds Campo Arañuelo battery

Iberdrola has moved Campo Arañuelo from plan to operation, saying on May 27 that it had inaugurated Spain’s largest energy-storage battery at its solar complex in Belvís de Monroy, in the province of Cáceres. The installation is linked to the Campo Arañuelo I and II photovoltaic plants and is designed to store power and return it to the grid when needed, according to the company. The announcement means the project is no longer just a proposed battery build cited in social-media posts on June 1, but an operating asset already presented by Iberdrola a few days earlier. International Finance and other trade outlets later echoed the company’s statement. ### So what exactly is Campo Arañuelo? Campo Arañuelo is a battery energy storage system at Iberdrola’s solar complex near Belvís de Monroy in Extremadura. Iberdrola said the battery has 58 megawatts of power and 120 megawatt-hours of storage capacity, making it the biggest such installation now operating in Spain. The facility consists of two lithium iron phosphate battery modules of about 60 MWh each, according to Iberdrola’s press material and follow-up industry coverage. The battery is connected to the adjacent Campo Arañuelo I and II solar plants, which Iberdrola said allows solar output to be stored and dispatched later. ### Why did Iberdrola put the battery next to solar plants? (iberdrola.com) Iberdrola said the battery is intended to increase grid flexibility and help integrate renewable generation. In its statement, the company said storage can support the connection of new demand that needs firm power and can help accelerate electrification. Mario Ruiz-Tagle, chief executive of Iberdrola España, said in the company release that the infrastructure advances the group’s storage strategy and helps connect new demand requiring reliable supply. (iberdrola.com) That framing matches Iberdrola’s broader public messaging that grids and storage are needed to support higher renewable penetration in Spain. (iberdrolaespana.com) ### Where does this fit in Iberdrola’s Spain storage buildout? Iberdrola has been using Campo Arañuelo as a test bed for storage for several years. In 2021, the company commissioned Arañuelo III, which it described as Spain’s first photovoltaic project with an attached storage battery, with 3 MW of power and 9 MWh of capacity. (iberdrolaespana.com) In January 2026, Iberdrola also said it had put into operation large batteries in Alarcón, Cuenca, which it then described as the country’s first large-scale batteries. The Campo Arañuelo inauguration on May 27 updated that portfolio again, with a larger 120 MWh site in Cáceres. ### Why did the June 1 posts make it sound newly announced? International Finance published a June 1 item saying Iberdrola had “recently inaugurated” the facility, and the social-media post cited by the card appears to reflect that secondary coverage rather than a fresh June 1 corporate announcement. (iberdrola.com) Iberdrola’s own press release is dated May 27. (iberdrolaespana.com) That date matters because it changes the chronology: the most direct source shows the battery was already inaugurated before the June 1 reposts circulated. The underlying facts of the project match across the sources, but the company statement places the event several days earlier. ### What should readers watch next? Iberdrola’s next public milestones are likely to come through its Spain press room and project updates tied to storage deployment. (internationalfinance.com) The company said in 2024 that it planned six new storage batteries in Spain, including two in Cáceres, and Campo Arañuelo now appears to be one of the clearest realized steps in that pipeline. (iberdrola.com) Belvís de Monroy and the wider Extremadura portfolio are likely to remain the named locations to watch as Iberdrola expands storage linked to renewable generation. Iberdrola’s official press pages and Iberdrola España updates are the primary sources for the next project-specific disclosures. (iberdrolaespana.com 1) (iberdrolaespana.com 2)