UK-based energy storage company Field has broken ground on its Holmston battery storage project in South Ayrshire and is preparing to begin construction at a second site, Drum Farm near Keith, in early autumn, the company said on Tuesday.
Each facility is expected to deliver 50 megawatts (MW) of power and 100 megawatt-hours (MWh) of energy storage capacity. The Holmston site is scheduled to be operational in the first half of 2026, while Drum Farm is expected to come online by the end of 2025.
Construction at Holmston is being led by Powersystems, with Clarke Energy appointed for the Drum Farm site. Both projects will use battery systems supplied by Envision Energy.
The company said the two storage sites will be capable of powering approximately 26,000 homes for two hours when fully charged.
Located north of the B6 transmission boundary between England and Scotland—a region with high energy constraint costs—Field said the batteries are designed to help reduce the curtailment of wind generation and lower overall system costs. National Energy System Operator data indicated constraint costs exceeded £1.7 billion in 2024 and reached nearly £1 billion in the first half of 2025.
“Getting shovels in the ground at Holmston – and soon at Drum Farm – is another big step forward for Field as we work to accelerate the transition to a secure, cleaner energy system in Scotland and across the UK,” said Amit Gudka, Field’s chief executive.
“Built in strategic locations to support the grid, battery storage can make a difference to bill payers by reducing constraint costs and helping run the energy system in a more efficient and flexible way,” he added.
The projects are supported by a £42 million senior non-recourse loan from Rabobank and ING. Field will manage the systems using its proprietary optimisation platform, Gaia, to operate in wholesale and balancing markets.
Field’s broader pipeline includes 3.5 gigawatts (GW) of battery storage capacity under development across the UK. The company views battery storage as a key enabler of the UK’s clean energy transition, helping to stabilise intermittent renewable energy sources.
