RheEnergise: Investing in energy storage

LinkedIn
Twitter
Reddit
Facebook
Email

Stephen Crosher, CEO of RheEnergise, discusses the future of energy and the growing importance of energy storage as part of the energy mix.

Twenty-first-century trends in energy are now crystal clear: within a generation, renewable power will dominate, and fossil-fuel assets will be, at best, chronically underutilised and probably stranded.

Transitioning to ultra-low carbon generation brings both challenges but also unparalleled opportunities. Power generation, which will increasingly serve mobility, heat, and industry, will be monopolised by wind, solar, nuclear and potentially tidal power.

There are many opportunities, worth billions, if not trillions, in financing new clean generation assets with abundant banks and infrastructure funds willing to make those investments. However, the energy system will increasingly become one where generation and supply do not match demand, and demand does not fit the generation supply profile. Everything is out of balance over short, medium, and long periods. In addition, due to climate change demands, filling the gaps with gas generation will not be a realistic long-term option.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

Different forms of flexibility or energy storage systems will solve the significant mismatch between generation and demand or the intermittency problem. The solutions must provide services over different time periods, from seconds (frequently) to weeks (very occasionally). These providers of technical solutions for flexibility will become huge companies (the green unicorns) over the next 20 years, with revenues measured in billions.

A clear example of the growth we should now expect for the flexibility solution providers can be taken from a company like the wind turbine company Vestas, the world’s largest manufacturer of wind turbines. Vestas made their first sale in 1979; by 2000, turnovers were €868 million, and by 2022, revenues were €14.5 billion. The growth is not expected to slow, as there is considerable pressure to grow renewable energy generation deployment by 300% over the next seven to 10 years.

We can expect that a handful of companies will dominate the short-duration energy storage market, a further handful will dominate the inter-seasonal energy storage market, and lastly, there will be several companies that dominate the medium-duration energy storage space, such as RheEnergise.

The medium-duration energy storage space, providing grid flexibility, is the part of the market where the most significant trading volume will occur. It is the part of the market that will do the heavy lifting, at low cost, to balance the daily cycles of solar (and tidal) and the twice-weekly cycles of wind.

There will be significant investment wins in deploying capital into infrastructure, but even bigger investment win-wins into the solution providers, those providing the new physical infrastructure plant and equipment.

RheEnergise is a UK-based company bringing innovation to pumped energy storage with a grid-scale solution called High-Density Hydro®, providing four to 16 hours of energy storage in the 10MW to 100MW power range. The company is currently fundraising directly with family offices and institutional investors and also on Crowdcube for retail investors. The funds raised are to accelerate our commercialisation and strengthen our IP portfolio. Click here to access the page.

Investment risk warning: Don’t invest unless you’re prepared to lose all the money you invest. This is a high-risk investment, and you are unlikely to be protected if something goes wrong. You can find out more here.

9 June 2026
Stuttgart, Germany
Held alongside The Battery Show Europe, Energy Storage Summit provides a focused platform to understand the policies, revenue models and deployment conditions shaping Germany’s utility-scale storage boom. With contributions from TSOs, banks, developers and optimisers, the Summit explores regulation, merchant strategies, financing, grid tariffs and project delivery in a market forecast to integrate 24GW of storage by 2037.
10 June 2026
3pm BST / 4pm CEST
As the energy transition accelerates, solar + BESS hybrid projects are rapidly becoming the new standard. But while many developers approach these systems with a “solar mindset,” battery storage introduces a fundamentally different layer of operational complexity, one that directly impacts performance, revenue, and long-term asset value. In this webinar, industry experts from Sonnedix and TWAICE will explore how to design and operate solar + BESS projects that are not only optimized for today’s requirements, but resilient and profitable in tomorrow’s markets.
23 June 2026
Munich, Germany
Every year, ees Europe, Europe’s largest and most international exhibition for batteries and energy storage systems, provides a networking opportunity for the industry’s key players – all under the motto “Innovating Energy Storage”. It focuses on the latest technologies, trends and market developments. ees Europe will take place from June 23–25, 2026 – for the first time running from Tuesday to Thursday – as part of The smarter E Europe at Messe München.
30 June 2026
Novotel London West, London, UK
The Clean Power Summit 2026 is the UK’s premier event for stakeholders driving the clean energy transition. As renewable capacity is forecast to nearly triple by 2035, this Summit offers a unique platform to shape the future of lowcarbon power, strengthen energy sovereignty, and unlock economic growth. Bringing together policymakers, developers, investors, network operators, and industry enablers, the Summit delivers actionable strategies to achieve the UK’s 2030 clean energy targets. With four dedicated content streams, attendees will gain exclusive insights into offshore wind expansion, floating wind innovation, regional manufacturing, and grid upgrades across the North Sea. This is your opportunity to connect with key decision-makers, explore investment opportunities, and collaborate on solutions to navigate complex supply chains and policy frameworks. The Clean Power Summit 2026 ensures stakeholders are equipped to turn ambition into action, driving progress and securing a sustainable energy future for the UK.
30 June 2026
Sacramento, California
RE+ Storage provides a platform for business connections and industry-focused education dedicated to the evolving energy storage market. The event brings together key industry players to discuss supply chain management, energy storage safety, emerging technologies, and the local and federal policies shaping the U.S. market. Attendees can explore new solutions, exchange ideas, and discover innovative applications driving the future of energy storage.
25 August 2026
Sydney, Australia
Building on our successful global portfolio of energy storage network events including our successful Energy Storage Summit Australia, combined with the exponential buildout of large-scale energy storage, we are delighted to return for the inaugural Battery Asset Management Summit Australia in Sydney (25-26 August 2026). The Battery Asset Management Summit has been received worldwide with huge optimism and has quickly established itself as leading event series for connecting asset owners with optimisers, software providers, and many more.

Read Next

June 5, 2026
Developer EDF power solutions North America and developer-operator Abu Dhabi Future Energy Company – Masdar, have entered into 15-year power purchase agreements (PPAs) for a California, US solar-plus-storage project.
June 5, 2026
Virtual power plant (VPP) operator and distributed energy resource (DER) platform Voltus and tech giant Google have signed a three-year 100MW agreement for the PJM region in the US.
Premium
June 5, 2026
Liam Critchley examines the modelling, safety standards and analytics that aim to mitigate the risk of thermal runaway in lithium-ion battery energy storage systems (BESS).
June 5, 2026
Akaysha Energy’s Waratah Super Battery is now operating at 700MW and 1,680MWh following the successful return to service of High Voltage Transformer 2 (HVT2), the BlackRock-backed developer confirmed in a market update today (4 June).
June 5, 2026
Australia’s Victorian government has approved four new energy projects worth a combined AU$2.4 billion via its DFP, including 1,390MW of BESS.