UK's Grid Stability Bet: Varco Taps Global Titans for Yorkshire Megabattery

LEEDS, England – June 23, 2026 – In West Yorkshire, near the village of Wilsden, the future of Britain’s power grid is taking shape. Varco Energy, a specialist owner and operator of battery storage, has unveiled a formidable consortium of global engineering giants to construct its flagship 100MW / 244MWh Old Allen Road Battery Energy Storage System (BESS). This project is more than just another asset in the UK's green transition; it is a critical piece of infrastructure designed to address the fundamental physics of a grid rapidly shedding its fossil fuel anchors.

Backed by the specialist fund Adaptogen Capital, Varco has selected Italy-based NHOA Energy, in partnership with infrastructure powerhouse IQA-Elecnor, to deliver the turnkey project. GE Vernova will supply the crucial high-voltage transformer. Set to come online in 2027, the facility represents a strategic bet on a technology that is becoming the bedrock of the UK’s energy security: grid-forming batteries.

The £11 Billion Grid Game

The Old Allen Road project doesn't exist in a vacuum. It is a direct response to the immense commercial and strategic opportunity presented by the UK's clean energy ambitions. As Britain targets a net-zero power system by 2035, the grid is undergoing a seismic shift. The retirement of heavy, spinning turbines from coal and gas plants has created a stability vacuum, leaving the system vulnerable to frequency and voltage fluctuations from intermittent wind and solar generation.

This challenge has created a multi-billion-pound market for solutions. The government estimates that up to £11 billion in investment will be needed in energy storage assets by 2035 to support a target of 23–30GW of capacity. Investors are taking note. Varco Energy is backed by the Adaptogen Capital Battery Storage Fund, which successfully raised £207 million in 2023, exceeding its target and securing significant debt financing from NatWest. This capital is being deployed to build out Varco's portfolio, which is on track to hit 350MW of operational assets by 2027.

The Old Allen Road site, acquired from Q4 Holdings and 23 Energy, marks the final capital commitment from Adaptogen’s first fund. It joins a growing portfolio that includes the operational Native River and Sizing John BESS projects, the latter of which is also being upgraded with advanced grid-forming capabilities. This aggressive expansion highlights a clear strategy: to build the foundational assets required for a renewables-heavy grid, capturing value by providing essential balancing services.

“The delivery of the Old Allen Road BESS project is the next step for Varco as it brings onstream 350MW of BESS assets by 2027,” commented Richard Whitmore, Director at Varco Energy. “At Varco, we are leveraging world-class expertise to deliver a flagship energy storage system that will play a vital role in supporting the UK’s transition to a net zero power system.”

A New Foundation for the Grid

The true significance of the Old Allen Road project lies in its technical specifications. The system is being designed with advanced grid-forming capabilities. In simple terms, this allows the battery's inverters to mimic the stabilizing properties of traditional power plants, providing synthetic inertia and short-circuit power to maintain grid integrity.

This isn't merely a feature; it's a necessity. The National Energy System Operator (NESO) has been urgently procuring these services through its Stability Pathfinder programmes. As non-synchronous renewables replace synchronous fossil fuel generators, the grid loses its natural resilience. Grid-forming batteries can create their own voltage and frequency, actively strengthening the grid rather than just following its lead. Projects like this are expected to save consumers hundreds of millions of pounds by reducing reliance on costly, last-resort balancing actions and avoiding the curtailment of renewable energy.

The West Yorkshire site is therefore not just storing and releasing energy; it is becoming a structural component of the national transmission system. It will provide frequency and voltage regulation, reserve capacity, and load-shifting services that are critical for integrating more renewables and ensuring a stable, reliable supply of electricity.

Global Expertise, Localised Impact

Delivering such a complex piece of infrastructure requires a carefully orchestrated partnership. Varco has opted for a consortium model, assembling a team of specialists to mitigate risk and ensure best-in-class execution. The partnership between NHOA Energy and IQA-Elecnor is central to this strategy.

NHOA Energy brings its proprietary BESS technology and a proven track record. The company's credibility was recently cemented with the successful, on-time delivery of Neoen's 477MWh Blyth BESS in Australia, a project also completed in partnership with Elecnor. This success demonstrates their joint capability to execute large-scale, complex storage projects under demanding regulatory environments.

“After the successful commissioning of the 477MWh Blyth BESS in Australia, NHOA Energy and Elecnor are joining forces once again to bring proven expertise... to support Varco Energy in delivering one of the most ambitious battery storage projects in the UK,” said Fabrizio Ciaccia, Vice President EMEA at NHOA Energy.

IQA-Elecnor, the UK arm of the Spanish infrastructure giant, will handle the crucial balance of plant and high-voltage interconnection works, connecting the battery to the 275kV transmission network. Their experience with grid stability projects in Scotland and Ireland provides the specific expertise needed. Rounding out the core team is GE Vernova, which will supply the high-voltage transformer, a critical component for stepping power up to grid level. This division of labour allows each global leader to focus on its core competency, creating a powerful and efficient project delivery engine.

The project's location is no accident. Sited next to the existing Bradford West Grid Supply Point, it capitalizes on a key piece of national infrastructure. However, this strategic placement within the Green Belt has not been without local scrutiny. Concerns over fire risk and visual impact have been raised by the community, reflecting a national conversation about how to integrate this vital new infrastructure. As the project moves towards its 2027 operational date, demonstrating robust safety protocols and effective community engagement will be as critical as its technical performance.