With Sweden’s renewable energy share expected to reach 40% of total electricity consumption, the importance of grid flexibility has never been greater.
So, when Centrica, a British multinational energy company with operations in Sweden, needed a turnkey BESS solution in central Sweden to strengthen the grid, two Omexom business units, one in France, one in Sweden, joined forces to make it happen.
Omexom C&S (Conversion & Storage) and Omexom in Sweden have completed two battery energy storage system (BESS) projects for Centrica in Bullerforsen and Romme, both located in Dalarna County, central Sweden. Together, the two 20 MW/20 MWh systems deliver a combined capacity of 40 MWh, enough stored energy to power 20,000 households for one hour. The projects mark the first collaboration between the two Omexom entities and the first joint engagement with Centrica, setting a strong precedent for cross-border delivery within the Omexom network.
The partnership works because each entity brings what the other cannot do alone. This division of expertise is deliberate. BESS projects at this scale demand both high-level technical design and precise local delivery.
Together, the two teams cover that full spectrum. The result was a clean division of responsibility across design, procurement, civil works, installation, and commissioning, delivered as one seamless solution for the client.
Want the full breakdown of how the two teams split the scope, the fieldwork challenges they navigated, and what Centrica’s requirements pushed them to negotiate? Read the full article on The Agility Effect, including insights from both Business Unit Managers on the partnership and the technical challenges.
Both systems were up and running by the end of 2025. Centrica is already talking about the next steps, with discussions underway for Phases 2 and 3 of its Swedish investment program. For Omexom, this project meant more than just meeting a deadline, it was proof that the consortium model truly works.
Sweden’s BESS market saw explosive growth in 2024, jumping from 80 MW to over 610 MW of installed capacity in just one year. The need for flexible storage across European grids is only getting stronger. The partnership model Omexom tried out here, pairing a specialist integrator with a local expert under one EPC contract, is built to be repeated, and it’s already on the table for the Nordics, Germany, and Benelux.
This Franco-Swedish project may be the first chapter of a much bigger story.
Interested in storage and battery services? Get in touch with Omexom Conversion & Storage today to discuss your project and discover tailored energy solutions.
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