Repono acquires BESS project for 404 MWh in Romania

Swedish energy storage operator Repono has completed the acquisition of a 202 MW / 404 MWh battery energy storage system project located in Romania’s Argeș county.

Romania has become one of the most active markets for battery energy storage system (BESS) projects in South East Europe.

Developed by a domestic firm, the Argeș project reached a ready-to-build stage, Repono said. The investment benefits from a grid connection contract with the country’s transmission system operator Transelectrica. The entry point is the 220 kV Pitești substation, northwest of Bucharest.

Once operational, it will be among the largest grid-scale storage assets in Southeast Europe, capable of storing and releasing enough energy to supply more than 120,000 four-person households during peak-demand periods, according to the company.

The partnership with local developers includes a framework for additional energy storage projects

A partnership with local developers is set to drive significant future growth for the firm, based in Sweden.

It includes a framework for additional energy storage projects across Romania with a combined capacity of up to 1.4 GW, reinforcing Repono’s long-term commitment to the market, the update reads.

“This transaction represents an important milestone for Repono AB and demonstrates our continued commitment to developing large-scale storage infrastructure that supports Europe’s energy transition,” CEO Karim Nils Grueber stated.

De Kool: Large-scale storage assets are key enablers of a stable European power system

The Argeș project’s market optimization will be handled by Gunvor, in collaboration with Vienna-based optimiser Enspired. They are tasked with managing the energy offtake and market strategy to ensure the BESS is efficiently integrated into the Romanian and regional power markets.

According to Harmen de Kool, Chairman of the Board of Repono and a representative of InnoEnergy, large-scale storage assets like the one in Argeș are key enablers of a stable and decarbonized European power system.

It further fortifies InnoEnergy’s aim to achieve carbon neutrality, he added.

With this acquisition, Repono continues to expand its European portfolio of grid-scale BESS, with active developments spanning Germany, Romania, Italy, Austria, and Poland.

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September 15, 2025

by AEA in News

ElevenEs mulls building advanced battery cells gigafactory in Poland

Battery technology developer ElevenEs, which has production facilities in Serbia, plans to build a EUR 600 million gigafactory. It revealed that it is considering locations in Poland. The company said InnoEnergy is now one of its main shareholders.

Now backed by a group of international investors including the InnoEnergy fund, ElevenEs announced its next major step. The company registered in Luxembourg said it is “seriously considering Poland” for its planned investment: a EUR 600 million gigafactory for advanced battery cells.

The battery technology developer, which operates production facilities in Serbia, has unveiled its latest product in May. It said the Edge574 blade cell charges up to 80% in 12 minutes. The cycle life translates to a range of at least 500,000 kilometers for electric cars, ElevenEs’ update reads. The company specializes in lithium iron phosphate (LFP) technology.

“ElevenEs is revolutionizing the battery market, including batteries intended for the electric vehicle industry,” according to its statement on the gigafactory project.

The company aims to begin construction by the end of 2027 and eventually employ 700 engineers.

Company shortlists Kraków, Silesia, Lower Silesia

ElevenEs hasn’t determined the exact location, but it hinted it would be in southern Poland: Kraków, Silesia or Lower Silesia. The country would benefit from technology transfer and the opportunity to further develop it within the domestic economy, it stressed.

ElevenEs’ CEO Nemanja Mikać praised the Polish labor market, supply chain and access to Western European markets

An open labor market, availability of suppliers within the supply chain, presence of many universities, and access to Western European markets are all undeniable advantages of Poland, said founder and Chief Executive Officer of ElevenEs Nemanja Mikać.

“If we add potential public sector involvement to this, we have one of the most attractive places for investment in Europe… From a technology development standpoint, we are a clear leader in Europe. One of the most significant benefits of our technology is its ability to integrate different industrial sectors and build an innovation ecosystem around it,” he stated.

InnoEnergy becomes one of main shareholders of ElevenEs

In introducing the company to Poland and securing additional investors, ElevenEs is being supported by InnoEnergy. Since its founding in 2010, it has invested in over 540 European tech companies. InnoEnergy is now one of the main shareholders of ElevenEs.

“We specialize in connecting different stakeholder groups. Our broad ecosystem includes financial and industrial investors, as well as technology providers, research institutions, and academic centers. The projects we’ve completed demonstrate our experience and ability to execute large, complex investment ventures. We see enormous potential in the ElevenEs project – not only will it help build a strong, competitive Polish economy, but it may also allow Europe to finally establish a significant presence in the global battery value chain. This is one of those projects that could change the rules of the game,” said Mikołaj Budzanowski, CEO of InnoEnergy for Central Europe.

There are investors willing to support the project, but the success of the investment depends critically on the timing and decisiveness of the public sector, he explained. He also highlighted the necessary role of financial institutions.

Serbia in scope for mass production

Of note, Mikać recently said that ElevenEs would “localize and scale” LFP battery production in Serbia over the next seven or eight years. It could become the first country in Europe to launch mass production, he added.

The company wants to participate in creating a robust supply chain in Serbia and Central and Eastern Europe, but also potentially across the continent, he asserted.

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