• Clarke Energy and INNIO Group have now completed delivery of the full fleet of “Ready for H₂” Jenbacher J624 engines at Statera Energy’s project in Thurrock.
• Thurrock Power, a 450-MW flexible generation plant, will support grid stability and flexibility in Southeast England and power up to 1 MM UK homes once fully operational.
• The project sits alongside Thurrock Storage, a 300-MW co-located battery energy storage system, designed to integrate with intermittent renewables.

Clarke Energy, a Rehlko company, and INNIO Group have now supplied the full fleet of Jenbacher J624 engines to one of the world’s largest gas engine peaking stations in Thurrock, England. It is being constructed by Statera Energy, a leading developer, owner and operator of flexible energy assets. With full operations targeted for late 2026, the project will have the capacity to power up to 1 MM UK homes.

Once energized, the project will deliver up to 450 MW of flexible, fast-start power. Its strategic positioning near London means Thurrock Power, along with Statera’s co-located operational 300-MW battery storage site, will deliver essential grid flexibility and play a key role in balancing the capital’s energy system. It also underscores Rehlko’s role in shaping the future of distributed energy systems.

Unmatched flexibility and efficiency. The Jenbacher energy solution combines high electrical efficiency, rapid startup in less than 5 min, cost advantages over medium-speed engines and simple-cycle gas turbines, and faster construction timelines compared to these alternative technologies. Its scalable deployment allows for high efficiency at partial loads, with power generation ramping from as low as 2.25 MW to the full 450 MW capacity. This flexibility enables the plant to swiftly respond to fluctuations in electricity supply and demand. Supported by Rehlko’s expertise in energy innovation, Clarke Energy delivers solutions that enable grid resilience and decarbonization.

The plant will operate primarily on pipeline gas and is designed to run on a variety of fuel blends, including biomethane and hydrogen (H₂). This supports the transition to a net-zero energy system as the gas grid evolves towards decarbonization.

Building on a proven partnership. The project marks the second major collaboration between Statera Energy, Clarke Energy and INNIO Group, following the successful deployment of the Creyke Beck Power flexible generation project in Cottingham, Humberside.

Matt Arnold, Director of BESS & Flex-Gen at Statera Energy stated: “Thurrock Power represents a significant milestone for Statera. Once operational, it will be the UK’s largest flexible generation project, providing critical capacity to balance the grid and enable the transition to a renewables-led energy system. Together with Thurrock Storage, our sites support grid resilience and energy security. We selected Clarke Energy and INNIO Group’s Jenbacher technology for their rapid deployment capabilities, fuel flexibility, and exceptional startup performance – essential features for meeting the UK’s evolving energy demands.”

Ben Wilson, Managing Director of Clarke Energy, added: “We are honored to support Statera Energy in delivering this industry-leading flexible generation plant. INNIO Group’s Jenbacher innovative gas engines provide unmatched responsiveness and scalability, ensuring reliable power when and where it’s needed. As the UK integrates more renewable energy, facilities like this will be essential to maintaining grid stability.”

This groundbreaking project highlights the increasing need for fast-acting, dispatchable power to complement intermittent renewable generation, reinforcing the role of advanced engine-based technology in the UK’s evolving energy landscape and demonstrating Rehlko and Clarke Energy’s technical leadership in flexible, low-carbon solutions.