Global energy storage owner-operator BW ESS and energy trader Danske Commodities have announced a 10-year optimisation agreement covering 100% of the 200 MW / 857 MWh Berkswell Battery Energy Storage System, one of the UK's largest battery storage projects and among the country's longest-duration battery assets.

A decade-long trading agreement for one of the UK's largest storage projects

The announcement was made in London on 6 October 2026. Under the terms of the 10-year floor agreement, Danske Commodities will provide trading and optimisation services for the entire asset.

The agreement marks a significant milestone in the commercialisation of Berkswell, which entered construction in September 2026 and is expected to become operational in the fourth quarter of 2027.

Developed by BW ESS from greenfield origination and co-owned with energy and decarbonisation investor AIP Management, the project forms a key part of BW ESS' UK portfolio.

Flexibility near major demand centres

Once operational, Berkswell will be capable of supporting the electricity needs of around 700,000 UK homes for up to four hours. By storing electricity when generation is abundant and discharging it when demand increases, the project will support the integration of renewable energy and strengthen the resilience, flexibility and security of the UK electricity system.

The four-hour battery system is located near Solihull in the Midlands, a position the companies describe as strategically placed near major centres of electricity demand, enabling it to provide flexibility where it is needed most and help maintain a reliable power supply. It will be among the longest-duration battery storage sites in the UK.

The project is expected to use Sungrow's PowerTitan 3 technology to deliver the efficiency, reliability and performance required by the evolving UK electricity network.

Commercial foundation and trading expertise

Kilian Leykam, Chief Commercial Officer of BW ESS, said the agreement provides a strong commercial foundation for Berkswell and helps unlock the long-term value of the strategically important energy storage project. "With construction under way, we are another step closer to bringing the project online and delivering critical flexibility to the UK grid," he said.

Jakob Sørensen, CEO of Danske Commodities, said the company was proud to have been selected by BW ESS to optimise Berkswell. "Drawing on more than 15 years of experience in British power markets, we will use our trading expertise to maximise the value of the asset while providing the flexibility needed to integrate intermittent renewable generation. The UK is a core market for us, and Berkswell is an important addition to our growing portfolio of flexible assets," he said.

About the companies

BW ESS is a global energy storage owner-operator active in the UK, Australia, Italy, Germany, Spain and Sweden. It has more than 540 MWh of operating Battery Energy Storage Systems, approximately 12 GWh under construction or pre-construction, and a development pipeline of several gigawatts.

Part of BW Group, the company builds on decades of global infrastructure experience, takes a long-term view of projects and partnerships, and focuses on unlocking value throughout the energy storage asset lifecycle.

Danske Commodities is an energy trading company specialising in power and gas trading, offering balancing, optimisation and hedging services to energy producers and suppliers.

Every day, the company completes more than 130,000 trades across more than 40 countries, moving energy from where there is more than needed to where it is needed most. Danske Commodities is a wholly-owned subsidiary of Norwegian energy company Equinor, operating under its own name and brand.

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