A novel combination of offshore wind generation and pumped hydro storage — using existing infrastructure, existing land, and 100-year-old technology put together in a new way.
"Basic maths and physics. Uses nothing new. Just put together in a new way."
— Barry Llewellyn, inventor
When the wind blows, pump water uphill. When power is needed, let it flow back down. The innovation is not the technology — it is the configuration. Linking offshore and onshore wind farms directly to pumped hydro storage using existing consented infrastructure.
Surplus offshore wind power drives pumps at the coast. Seawater travels inland through a buried pipeline following the existing consented cable corridor. Stored at elevation. Released on demand through reversible turbines at the existing grid connection.
Freshwater pumped hydro across existing onshore wind farm topography. Multiple reservoir stages cascade down verified OS hill profiles. Each stage generates and pumps independently. Up to eight stages from a single site using natural rainfall catchment.
This is not just an energy storage project. It is a replicable national infrastructure programme with lasting value across every government mandate.
Turns intermittent wind into guaranteed 24/7 power. Grid stability. Net zero. No curtailment waste. Qualifies for capacity market and CfD premiums.
Naturalised reservoir banks. Native planting. Bat corridors. Wading bird and osprey habitat. Delivers Biodiversity Net Gain exceeding mandatory requirements.
Apprenticeships. Skilled trades. NEET reduction. Decades of local employment in coastal and post-industrial communities. Not temporary contracts.
British Steel. British supply chain. Local wages circulating locally. Grant eligible across Green Jobs, UK Shared Prosperity Fund and Net Zero streams.
Energy independence. Domestic steel and engineering capability. Underground infrastructure. A stronger NATO partner — through civilian investment, not defence spending.
Pipeline corridors as coastal footpaths and wildlife routes. Visitor centres. Cafés. Education. Connecting the England Coast Path to the South Downs Way.
Enter a wind farm's capacity and the available head at a candidate site to see the indicative storage potential. Basic maths. Real physics.
* Indicative only. Based on firm generation premium of £85/MWh vs £55/MWh intermittent. Full financial modelling available under NDA.
Full CAD data, OS-verified elevations, pipeline geometry and energy calculations are available for prototype sites. Access requires a signed NDA.
This section contains verified CAD parameters, OS elevation data and pipeline specifications for UK prototype sites. Access is restricted to parties who have signed the mutual NDA.
Incorrect access code. Please request access via the NDA contact form below.
Don't have an access code? Complete the NDA request below and Barry will be in touch within 48 hours.
The concept's primary prototype. Uses Rampion 2's existing consented landfall at Climping Beach and grid connection at Bolney substation. Pipeline follows the existing consented cable corridor — no separate planning consent required.
The UK's largest onshore wind farm. Seven OS-verified hills across 55 sq km provide up to 8 cascade stages. 247m maximum head between Mossy Hill (467m AOD) and Howeburn Moss (220m AOD).
Priority dates established June 2026. Full technical details available under mutual NDA only.
Full CAD drawings, pipeline geometry, reservoir sizing, energy calculations and site analysis are available under a mutual non-disclosure agreement. Complete the form below and Barry will be in touch within 48 hours.
Your NDA agreement has been logged and Barry will be in touch at the email address provided within 48 hours with the technical pack and access code for the site data section.
For urgent enquiries: barry@gravitystoragesystems.co.uk · 07852763861