Scotland's New Power Play: How Battery Storage is Securing the UK's Grid

EDINBURGH, Scotland – June 08, 2026 – In a move that signals a seismic shift in the UK’s energy landscape, Copenhagen Infrastructure Partners (CIP) has secured backing from two strategic public funds for its colossal Devilla battery storage project. The Scottish National Investment Bank and the UK's Nuclear Liabilities Fund have acquired minority stakes in the 500-megawatt facility, underscoring a powerful new consensus: the future of energy security is not just about generation, but storage. Once operational, the project will stand as one of Europe’s largest battery installations, a critical linchpin in the transition away from fossil fuels.

This isn't just another infrastructure deal; it's a blueprint for the future. The partnership illuminates how patient, public capital can be deployed to de-risk and accelerate the private-sector innovations urgently needed to stabilize a grid increasingly reliant on intermittent renewables. For Scotland, and the UK as a whole, the Devilla project represents a tangible step toward energy independence and a buffer against volatile global markets.

A New Powerhouse for Scotland's Grid

Located in Kincardine, Fife, on land adjacent to the former Longannet power station—once the largest coal-fired plant in Europe—the Devilla project is rich with symbolism. It represents a direct transition from the carbon-intensive energy of the past to the flexible, green infrastructure of the future. Construction on the site began in March 2025, with the facility expected to connect to the grid by late 2027 and become fully operational shortly thereafter.

The technical specifications are formidable. The Devilla site will feature a 500MW, 2-hour-duration lithium-ion battery system, capable of storing and dispatching 1,000 megawatt-hours (MWh) of electricity. This is a crucial function in a country that is a world leader in wind power. The batteries will act as a giant reservoir, absorbing surplus electricity when wind turbines are spinning on gusty nights and demand is low, and injecting it back into the grid during peak morning and evening hours when demand soars. This ability to balance supply and demand in near real-time is the key to unlocking the full potential of renewables.

Devilla is the flagship of a trio of transmission-connected battery projects being built by CIP in Scotland, co-developed with Alcemi. Alongside the Coalburn 1 and 2 sites, the portfolio will command a total power capacity of 1.5GW and store 3GWh of electricity. According to the developers, that's enough to supply over 4.5 million households with power for two hours, significantly enhancing grid resilience. The project's scale is enabled by technology partners like E-STORAGE, a subsidiary of Canadian Solar, which is supplying the battery containers, and construction management from Wood Group.

The Strategic Investors: Public Funds Powering Private Innovation

The most compelling aspect of this deal is the profile of the new investors. The Scottish National Investment Bank, Scotland's state-owned development bank, has committed £50 million to acquire its stake. This move perfectly aligns with its core mission to foster a fairer, more sustainable economy. By providing patient capital to a critical infrastructure project, the Bank is not just seeking a commercial return but is actively shaping Scotland's net-zero future.

"Battery energy storage systems are a critical part of improving energy security and stability," said Robin Tayal, Investment Director at the Scottish National Investment Bank. "The Devilla site is strategically located and will support renewable integration, grid stability, and system flexibility. We are pleased to partner with CIP and the wider investor group to support the delivery of this important asset."

Equally significant is the participation of the Nuclear Liabilities Fund (NLF). Established to cover the immense, century-long costs of decommissioning the UK's old nuclear power stations, the NLF's investment strategy requires stable, long-term growth. Its investment in Devilla is a shrewd move, diversifying its portfolio into the green energy sector while supporting the very grid its legacy assets are being retired from. Melissa Hope, Chief Executive of the NLF, noted the investment aligns with their objectives while "supporting UK energy security and economic growth."

For CIP, which retains a majority stake and continues to lead project delivery, bringing these partners on board validates the project's financial architecture. "As CIP’s development and construction portfolio of UK BESS projects continues to progress and grow, we look forward to welcoming the Scottish National Investment Bank and Nuclear Liabilities Fund as new equity partners on our Devilla site," commented Nischal Agarwal, Partner at CIP.

Securing the UK's Energy Future

The financial underpinnings of the Devilla project are as robust as its physical infrastructure. Its revenue is largely secured through a 10-year optimisation agreement with energy giant SSE plc and a 15-year capacity market agreement. In simple terms, these long-term contracts guarantee a significant portion of the project's income, providing the stability and revenue visibility that institutional investors like the SNIB and NLF demand. This structure creates a low-risk foundation while still allowing for exposure to market upside, a model likely to be replicated across the sector.

Beyond the financials, the project's strategic value cannot be overstated. Large-scale battery storage is the missing piece of the renewable energy puzzle. It reduces the need for gas-fired 'peaker' plants, which are expensive to run and emit carbon. By smoothing out the intermittency of wind and solar, projects like Devilla lower wholesale electricity prices, enhance the UK's energy independence, and accelerate the transition to a clean power system, a key government goal for 2030.

As Nischal Agarwal stated, the delivery of Devilla and its sister projects "will improve the UK’s energy security and reduce costs for British consumers through enhanced system flexibility and access to more low-cost renewables." This investment is not just about building a battery; it's about building a more resilient and affordable energy system for everyone.