Spanish storage: Iberdrola details its winning storage projects totalling $198M, local battery maker expands manufacturing

Earlier in December, the results of Spain’s auction for innovative energy storage projects was announced by the Institute for the Diversification and Saving of Energy (IDAE). Grants and funding, co-financed by European Regional Development Fund (ERDF) funds (2021–2027), and dating back to the original process that started in May, saw provisional results released in late October.

The results were 133 projects at a total of 2.4 GW and 10 GWh capacity, and winners of the auctions are starting to come forward.

A significant winner is Iberdrola España, which was awarded energy storage projects in six autonomous communities in Spain for a total of €170 million (USD 198 million) to build batteries, pumped storage, and industrial thermal storage.

This week Iberdrola provided more details, saying the projects will be located in Extremadura, Galicia, Castilla y León, Asturias, Andalusia, and the Valencian Community. The breakdown is a total of 11 battery energy storage systems (BESS) which will be co-finaced for €130 million (USD 151.4 million).

Iberdrola said the batteries will be located in Extremadura (4), Galicia (3), Castilla y León (2), Asturias (1), and Andalusia (1), will have an average power of 35-40 MW, with 10 of them featuring “shared access.” Five will be hybridized with photovoltaic technology, five with wind energy, and one will be a stand-alone system operating independently.

Other funding go to three industrial thermal storage projects allocated €22 million (USD 25.6 million), for various industrial uses in Andalusia, Galicia, and the Valencian Community, and €18 million (USD 20.9 million) will be spent on the expansion of a pumped storage project at the Torrejón plant, located between the Torrejón-Tajo and Alcántara reservoirs.

Manufacturing

Meanwhile, local battery production is ramping up as well. Spain’s Endurance Motive, a manufacturer of both stationary and mobility energy products, has announced to the stock market that it has raised €800,000 ($931,900) in funding via a convertible financing facility, and is planning a target of €1.5 million (USD 1.75 million), with a maximum of €3 million (USD 3.5 million). The funding is aimed at continuing to expand its Endurance-branded line of battery energy storage products while embracing investor enthusiasm for domestic production of battery energy storage systems (BESS), which is a required aspect of the ERDF funding.

The convertible financing, approved by its board in September, is subject to a 6.5% annual interest rate and may be converted into shares, subject to shareholder approval.

Endurance’s statement indicated the funds will be used to raise production capacity for both its battery packs and BESS container production from 500 MWh to 1,500 MWh by the end of 2026.

The funding will also support the company in its work on two standalone storage projects, listed at 44 MWh and 132 MWh, under the Endurance Motive name.

The company reiterated that during the calendar year 2025, it has “submitted offers to customers” totalling almost 1.7 billion Euros (USD 1.98 billion) for BESS projects related to the innovation energy storage project auction process .

Previously, this year, Endurance has showcased its 5 MWh Endurance ST product for large-scale energy storage projects at conferences and events, a the liquid-cooled containzered produt that has a five-year, 8,000-cycle warranty.