Bilfinger Wins E.ON Contract to Deliver Major District Heating Accumulator for Malmö’s Energy Transition

The heat accumulator in Malmö’s North Harbor will help create a more flexible and resilient energy system. Illustration: Liljewall Architects © E.ON

(IN BRIEF) Bilfinger has been awarded a contract by E.ON to deliver a major district heating accumulator in Malmö, Sweden, as part of the city’s efforts to strengthen energy flexibility and reduce CO2 emissions from district heating production by up to 50 percent. The approximately 70-meter pressureless accumulator will have a storage capacity of around 2,400 MWh and will be able to hold 45,000 cubic meters of heated water, enough to keep about 30,000 households warm during a cold winter day. Bilfinger will be responsible for engineering, prefabrication, installation, and commissioning, with prefabrication taking place at its workshop in Gródek, Poland. The project will use Bilfinger’s proven Hedbäck technology and is part of E.ON’s development of Malmö’s Northern Harbour as a new energy cluster. Engineering is expected to begin at the end of May 2026, with commissioning planned for winter 2028/2029.

(PRESS RELEASE) MALMÖ, 3-Jun-2026 — /EuropaWire/ — Bilfinger has secured a major contract from E.ON to deliver a large-scale district heating accumulator in Malmö, Sweden, supporting the city’s efforts to make its energy system more flexible and reduce emissions from district heating production by up to 50 percent.

The project will involve the engineering, prefabrication, installation, and commissioning of a pressureless district heating accumulator with a height of approximately 70 meters and a storage capacity of around 2,400 MWh. The facility represents Malmö’s largest single investment in district heating in many years and will play an important role in strengthening the city’s thermal energy infrastructure.

The accumulator will be capable of storing 45,000 cubic meters of heated water, enough to provide heating for around 30,000 households during a cold winter day. By enabling heat to be stored and used more efficiently, the system will help balance energy supply and demand, improve operational flexibility, and support lower-carbon district heating production.

Bilfinger will deliver the full project scope, covering engineering, prefabrication, installation, and commissioning. Prefabrication will be carried out at the company’s workshop in Gródek, Poland, allowing Bilfinger to maintain high manufacturing standards while supporting efficient project execution and delivery.

The facility will use Hedbäck technology, a proven pressureless accumulator solution designed to maximize storage efficiency in district heating systems. The technology strengthens Bilfinger’s position in the growing European thermal energy storage market, where cities and utilities are increasingly investing in infrastructure that can support decarbonization and more resilient energy supply.

Thierry Burki, Segment President Central Europe at Bilfinger, said the company is proud to deliver the landmark energy storage project for E.ON in Malmö. He noted that Bilfinger’s Hedbäck technology, combined with its engineering expertise and in-house prefabrication capabilities, enables the company to provide efficient and reliable solutions for Europe’s expanding district heating market.

Engineering work is scheduled to begin at the end of May 2026, with commissioning expected during the winter of 2028/2029. The project forms part of E.ON’s development of Malmö’s Northern Harbour into a new energy cluster, supporting the city’s wider role in the energy transition.

Bilfinger has built extensive experience in district heating storage projects across Europe. Previous references include a 1,800 MWh two-zone accumulator for Stadtwerke Leipzig in Germany and Estonia’s largest heat storage facility, a 1,100 MWh project delivered for Utilitas in Tallinn.

Bilfinger is an international industrial services provider with a vision to be the No. 1 for its customers in enhancing efficiency and sustainability within the process industry. Bilfinger’s comprehensive portfolio spans the entire value chain, from consulting & engineering to prefabrication & installation, access & insulation, and services that improve the asset performance of industrial plants.

The company operates in three geography-based segments: Western Europe, Central Europe, and International, with primary activities in Europe, North America, and the Middle East. Its process industry customers come from markets such as chemicals & petrochemicals, energy, oil & gas, and pharma & biopharma. With about 31,000 employees, Bilfinger upholds the highest standards of safety and quality, generating revenue of €5.4 billion in the financial year 2025. To achieve its goals, Bilfinger has identified two strategic levers: Operational Excellence to continuously improve its own efficiency and performance, and Market Expansion to strengthen customer orientation and establish Bilfinger as the partner of choice.

Media contacts:

Naomi Seibert
Group Communications & Public Affairs
Phone +49 621 459-3860
naomi.seibert@bilfinger.com

SOURCE: Bilfinger SE