Ostenweg contributes to the decarbonization of heavy industry with the Obourg floating solar project in Belgium

Ostenweg is proud to support a landmark initiative in Europe’s energy transition: the floating solar park at Holcim’s cement plant in Obourg, Belgium. Led by TotalEnergies and Holcim Belgium, the project will deploy 55,000 photovoltaic panels on advanced floating structures across the site’s former quarries, delivering a total capacity of 31 MWp. The clean electricity generated will directly power plant operations and is expected to avoid more than 110,000 tons of CO₂ over the project’s lifetime—an important step toward lower-carbon cement production.

Within this consortium, Ostenweg contributes specialized expertise in floating PV infrastructure, including solar boats and Zimmerman floating structures. Our engineering teams focus on constructability, reliability, and lifecycle performance—optimizing anchoring, cabling, and O&M access to ensure safe, efficient operation on water. This capability, built on lessons learned from comparable deployments, helps de-risk installation while maintaining high availability once commissioned.

Beyond emissions reduction, the project demonstrates how repurposing industrial water bodies can unlock new renewable capacity without competing for land. It also lays groundwork for the site’s broader decarbonization roadmap, which includes green hydrogen integration and a next-generation oxyfuel kiln powered by renewable energy.

Key facts

• Location: Obourg, Belgium (Holcim cement plant)

• Technology: Floating photovoltaic (FPV)

• Scale: 31 MWp, ~55,000 panels

• Benefit: >110,000 t CO₂ avoided (lifetime estimate)

• Consortium: TotalEnergies · Holcim Belgium · Ostenweg (floating infrastructure partner)

At Ostenweg, we see this project as more than construction—it is a tangible move toward clean, resilient power for heavy industry. By combining engineering discipline, innovation, and sustainability-by-design, we’re helping accelerate Europe’s path to net zero while showcasing the strategic role of floating solar in industrial decarbonization.

Contact us to learn how Ostenweg can support floating PV deployments at industrial sites and water reservoirs.