UK grid connection specialist G2 Energy moving into full wrapped BESS EPC services under Mitie ownership

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UK firm G2 Energy is moving into full BESS wrapped EPC services under its new owner Mitie, having focused on a grid connections and balance-of-plant (BOP) engineering services prior to its predecessor company’s bankruptcy last year, managing director Kelvin Ruck said.

Ruck was speaking to Energy-Storage.news at the Energy Storage Summit EU in London last week, seven months after outsourcing giant Mitie acquired the brand and certain assets of G2 Energy Limited out of bankruptcy proceedings.

Ruck, COO Nigel Hughes and 50 other employees were transferred to Mitie, and the new business unit trades as ‘G2 Energy, A Mitie Business’ while the legal entity is ‘Mitie Technical Facilities Management Ltd (# 0906936)’. The previous entity was G2 Energy Limited. Ruck is now a managing director at Mitie and heads up the new business unit.

Mitie took G2 Energy on because decarbonising buildings is a growing part of its huge facilities management division with many large commercial & industrial (C&I) clients having specific plans for the next 3-5 years. This means G2 Energy will move beyond just being a civil engineering and independent connection provider (ICP), as Ruck explained.

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“They see us and their other Mitie companies, such as Rock Power Connections and Customer Solar as key to being able to offer electric vehicle (EV), solar and battery storage behind-the-meter (BTM) to those clients so we’re now also doing some C&I BTM projects whereas before we were only doing large scale front-of-the-meter (FTM) capital projects,” Ruck said.

“We’ve just recruited a dedicated BESS director and in due course, we’ll start offering the full EPC wrap, including the procurement of the BESS equipment, whereas before we only did balance of plant (BOP) and the ICP element. This is because for the C&I clients that’s the way we’d have to do it, and now that is pushing us to do full EPC wraps for large-scale FTM projects too.”

Prior to G2 Energy Limited’s demise it had 30-35% of the IPC services market in the UK BESS sector, and Ruck thinks the firm can get back to that market share ‘soon’. The firm is working on securing the IPC, electrical and civil engineering works and BOP services for a 300MW/1GWh BESS project.

We will be publishing a separate article where Ruck discusses G2 Energy’s fall and the transition to Mitie in more detail in the coming days.

13 October 2026
London, UK
Now in its second edition, the Summit provides a dedicated platform for UK & Ireland’s BESS community to share practical insights on performance, degradation, safety, market design and optimisation strategies. As storage deployment accelerates towards 2030 targets, attendees gain the tools needed to enhance returns and operate resilient, efficient assets.

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