RES has surpassed 3GW of solar and battery energy storage systems under operations and maintenance contracts in Northern Europe.
The company said it now supports a total of 4GW of renewable energy assets under O&M agreements across the region, including the UK and Ireland, Germany, Poland, Norway and Sweden.
This includes more than 3GW of solar and energy storage capacity alongside 1GW of wind capacity, according to RES.
RES added that it has 3.4GW of solar and storage assets under O&M in Northern Europe.
Globally the company supports more than 45GW of renewable energy assets across wind, solar and storage technologies.
RES has also provided BESS asset management services in the UK since 2018 and is contracted to deliver services across 18 BESS projects in Northern Europe with a combined installed capacity exceeding 1.5GW.
Juan Gutiérrez, chief executive officer services at RES, said: “As solar and storage capacity continues to scale rapidly across Northern Europe, asset owners are increasingly focused on performance, reliability and long-term value.”
Gutiérrez said: “Passing the 3GW milestone for solar and BESS under O&M demonstrates both the strength of our regional portfolio and the trust our customers place in RES to deliver high-quality operational support.”
Gutiérrez added: “With 4GW of renewable assets now under our care in Northern Europe – spanning solar, storage and wind – we are well positioned to support customers with the technical expertise, digital insight and operational excellence needed to optimise performance and extend asset life across the region.”
RES expanded its UK solar and BESS portfolio in 2025 from 160 to 242 contracted assets, increasing capacity from 1.4GW to 3.4GW.
Recent UK contract wins include a three-year O&M contract for the 373MW Cleve Hill Solar Park, an asset management contract for the 500MW/1GWh Coalburn battery storage facility, and the renewal of a five-year O&M agreement covering 11 solar PV sites in the UK with a combined capacity of 121MW for The Renewables Infrastructure Group.
RES maintained second place in Wood Mackenzie’s global Solar PV O&M ranking over the past 12 months and was named Asset Manager of the Year, according to the company.
The company said its services are supported by a digital solutions business established in 2024 providing remote monitoring, predictive maintenance and performance analytics.