
Bringing innovation to pumped energy storage with High-Density Hydro®
2.5x the energy & 2.5x the power

Market Opportunity
The long-duration energy storage (LDES) market is projected to be vast:
- McKinsey: $4 trillion by 2040
- UBS: 34x market growth
- LDES Council: “Must scale 50x faster”
- Bloomberg: “Exponential growth”
Few markets are measured in trillions of dollars. RheEnergise’s solution delivers best-in-class economics and is designed for the most active segments of the traded energy market. As a result, we are experiencing exceptional customer demand.
Worldwide
More than enough sites to solve the energy transition many times over



Our Team, Skills & Experience
Together we are revolutionising energy storage
Our team is a diverse group of hardworking individuals who are united by the same goal of transforming the energy system and creating a sustainable future.
The team encompasses mechanical and electrical engineering, fluid dynamics, mechatronics, software engineering, chemistry. Business development & finance.
Exceptional team skills
4 PhDs, 9 Master’s Degrees,
14 languages spoken fluently.



Founders

Stephen has a strong track record in innovation, commercialisation and management across energy, property and retail. His previous roles in Commercial Director of Quiet Revolution and CCO of X-Wind Power (wind turbines) and MD of Fleet Renewables (EVs, tidal, solar, biomass).
Stephen Crosher
CEO & Co-Founder
Tamás is an engineer and serial entrepreneur with a PhD in experimental fluid mechanics from the University of Cambridge. 20+ years in the cleantech space turning ideas into solutions, creating teams that deliver, and building companies that provide solutions for customers. Previous roles include R&D Director at Quiet Revolution and CTO at NPI waste heat recovery for data centres.
Tamás Bertényi
CTO & Co-Founder
Graham has over 25 years’ experience in senior financial roles with a focus on cleantech. Previous roles include CFO at C-Capture (carbon capture) and previously at Yorkshire Hydropower, Eel power and Q-Bot (hydro, energy storage, energy efficiency AI). Experience includes raising tens of millions of funding for cleantech.
Graham Cook
CFO & Co-Founder
Board
Jim is the former MD of Actis’ Rezolv Energy Fund. Previously Partner at EnerCap Capital, private equity fund investing in renewable energy projects in the CEE region. Former CEO at Quiet Revolution and held senior positions at Biomass Engineering and Bowman Power. Experience of investing in power projects (up to £1.3 billion) and technologies. Fellow of the Energy Institute.
Jim Campion
Chair
Yves Rannou will provide valuable domain expertise, experience and guidance on the commercialisation of the company’s long duration energy storage technology, its project development and its business strategy.
Yves Rannou
Non Execuitive Director
Managing Director at Turquoise International. A merchant bank specialising in climate
technology investments. Finance advisory and investment management expertise.
Ian Thomas
Board Observer LCIF Fund
Advisors

Marjaana is a strategic finance/corporate development leader at Shell. She brings a wealth of expertise bringing strong end-to-end finance (FP&A, treasury) and practical governance. Key achievements include leading high-impact transactions across renewables, low-carbon infrastructure, and clean tech, and establishing a carbon portfolio optimisation desk for energy trading.
Marjaana Peters
Strategic Finance
Matthew is a chartered Mechanical Engineer with close to two decades of experience in the hydro industry. He is currently a Senior Mechanical Engineer and Technical Specialist for rotating machines, pumps and turbines at United Utilities. Matthew has overseen from conception to generation over 230 hydro projects with in excess of 128MW of installed capacity. He served on the British Hydro Association council for a number of years and was also a member of Scottish Renewables Hydro Work Group.
Matthew Crosher MBS CEng
Project Design Advisor
Michael is a clean energy consultant passionate about the transition to a sustainable world. He brings expertise in hydropower, solar, wind, storage, and conservation, helping clients from business case to commissioning. His current PhD research aims to understand how simulation and modelling can reduce the cost of turbine design.
Michael Pullinger
Mechanical Engineer
Carol is a senior sales executive. A master at brokering deals and win-win relationships, Carol has had success bringing new technology to larger industries. She trains and develops sales teams using a unique methodology that maps out opportunities. She has 20 years in the Oil and Gas Industry and holds a MSc. in Geophysics.
Carol Bartlett
Sales Strategist
Faculty of Engineering and Science, University of Greenwich. Peter is a colloid scientist whose research focuses on understanding and ultimately controlling interactions between the diverse components in complex formulations – polymers, surfactants, particles – to introduce positive performance characteristics to those formulations.
Peter Griffiths
Pro Vice Chancellor
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Senior Team
Kirsty is an experienced project and team leader who has worked in renewable energy for the last 25 years. She has led many landmark solar energy projects in the UK including co-located solar and energy storage at The Wave. She holds an Electronic Engineering degree and a masters in Renewable Energy Systems Technology.
Kirsty Berry
Project Manager
Christopher has a bachelor’s degree in chemical engineering from the University of Ottawa. He has over 10 years of experience spanning technology and process flowsheet development, hydrometallurgical battery recycling, and mass and energy balance modelling. He is passionate about the development and scaling of sustainable innovative engineering solutions.
Chris Baxter P.Eng
Sr. R&D Engineer
Alireza did his PhD at École de Technologie Supérieure in Automated Manufacturing Engineering. He has a few years hands-on experience of implementing control systems for a wide range of electromechanical and mechatronic systems. His areas of research interests are intelligent control systems, industrial electronics, power systems, neural network applications, and robotic control.
Alireza Mohseni
Sr. R&D Engineer
Frieder is an Experimental Fluid Dynamicist with a PhD from the Karlsruhe Institute of Technology (Germany). As a Postdoctoral Fellow at Queen's University, Frieder led multiple international research collaborations developing and applying new measurement techniques and flow-control approaches. The joint objective of his research has been to increase efficiency in the transportation and renewable energy sector.
Frieder Kaiser
Sr. R&D Engineer
Christian Porowski is a project engineer with nearly a decade of combined experience as a consultant in the design of sustainable and energy simulations, and as a lead mechanical engineer developing and building industrial vertical farms. He has obtained his Bachelor of Mechanical Engineering at McGill University, where he developed his passion for innovative sustainable technologies. His career has led him to contribute to projects in Switzerland, France, Australia and across Canada.
Christian Porowski
Sr. Project Engineer


In Memoriam
Prof. Cochrane was Director of Education and Associate Professor at Exeter University. A Chartered Engineer and Fellow of the Energy Institute. Richard designed the Quiet Revolution qr5 helical VAWT. He also led the development of a high efficiency double regulated Kaplan turbine.
Richard Cochrane passed away on 25th May 2023. He dedicated his career to fighting climate change. The entire team at RheEnergise is committed to carrying on his vision.
Prof. Richard Cochrane CIO
Co-Founder
Prof. Cochrane was Director of Education and Associate Professor at Exeter University. A Chartered Engineer and Fellow of the Energy Institute. Richard designed the Quiet Revolution qr5 helical VAWT. He also led the development of a high efficiency double regulated Kaplan turbine.
Richard Cochrane passed away on 25th May 2023. He dedicated his career to fighting climate change. The entire team at RheEnergise is committed to carrying on his vision.


Market Opportunity
There is an urgent need for diverse storage technologies for varying durations. Given the enormous scale of the market opportunity, no single technology can meet this demand alone. HD Hydro® fills a critical gap.
RheEnergise® will generate their revenues through enabling HD Hydro projects via:
Consultancy: Supporting project design and execution
Component Supply: Delivering core HD Hydro systems
via specialist third parties
O&M Services: For supplied components
Operational Royalties
Target customers:
Renewable energy developers, Independent Power Producers
and infrastructure operators.
Beachhead markets:
Mines, data centres, co-located solar/wind, and sites constrained by water availability where legacy hydropower is not viable.
Customer acquisition is relationship-led. They co-identify viable sites, provide performance and cost data, and facilitate development.

News

UK
RheEnergise Limited
Collective Auction Rooms
Room 302
5-7 Buck Street
London
NW1 8NJ
RheEnergise Limited | Company number 11927250
Registered office: Collective Auction Rooms, 5-7 Buck Street, London, United Kingdom, NW1 8NJ
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