Yves Rannou, former President & CEO of Alstom Wind and of GE Hydro amongst others, has joined the board of RheEnergise, the UK company that is developing a new and advanced form of long duration hydro-energy storage (LDES) with its proprietary High-Density Hydro® solution.

Working with RheEnergise’s senior management team led by CEO Stephen Crosher, and with the RheEnergise board chaired by Jim Campion, Yves Rannou will provide valuable domain expertise, experience and guidance on the commercialisation of the company’s LDES technology, its project development and its business strategy.

RheEnergise’s pre-commercial demonstrator project in Devon (UK), which is mainly funded by the UK Government, is set to commence operations within weeks with its first commercial-scale projects expected to enter operation by 2028. The company has agreements in place to deploy its technology in the UK, South America, Australia and mainland Europe.

Jim Campion, chair of RheEnergise said:



“We are delighted that Yves Rannou has joined the RheEnergise board. His deep knowledge of pumped hydro storage, accumulated over decades with leadership roles in companies like Alstom Hydro and GE Hydro, and his involvement with a range of start-ups working in the green economy, will be a huge asset for us. As we navigate the pathway to our first commercial LDES projects, Yves’ industry knowledge and expert insight will be enormously valuable.”

Yves Rannou said:



 “My experience at GE, Alstom, and other major industrial leaders such as Suez showed me a simple truth: standardisation of large-scale industrial products is the path to lower costs, greater efficiency, and the most affordable energy solutions. I've long believed the first company to apply this model to hydropower would revolutionise the energy transition; RheEnergise is that company. They are not only standardising system design, but their innovative, ultra-high-density fluid dramatically expands the range of viable storage sites and significantly reduces the project footprint. RheEnergise is finally unlocking the true scaling potential of pumped hydro.”

Stephen Crosher, CEO of

RheEnergise said:

“Yves Rannou is a respected industry leader, and his endorsement of our vision is a powerful catalyst for the next phase of our mission to build a decarbonised power grid. We’re thrilled to welcome him to our Board."