Operations & Maintenance

Through its five Operation and Maintenance Companies (“O&M”), Earthmill Maintenance, WEP & Silverford, Arena Capital Partners provides maintenance to over 1200+ turbines across Northern Ireland, UK & Italy.


Earthmill Maintenance is the market leader in supplying service and maintenance solutions to wind turbine owners across the UK, specialising in small and medium scale wind turbines.

Earthmill are dedicated to providing the very best customer service and supplying only the most efficient, reliable technologies to our customers. Our access to spare parts and consumables allows us to carry out faster repairs, ultimately increasing your turbines availability for generation.

Service and maintenance packages are available for  50kW- 500kW turbines specialising in Endurance.

Our Earthmill Hub in the UK provides cover for Endurance Models across the UK  and in 2021, Earthmill acquired the IP and supply chain rights for the Endurance E & X Series turbines.


Wind Energy Partnership is a leading Turbine Operations, Maintenance and Installation company with a strong track record of delivering quality product and excellent service to customers over the past 25 years across Ireland and the British Isles.

Wind Energy Partnership is Arena Capital Partners Limited maintenance partner in Northern Ireland and they maintain a fleet of over 50+ turbines in Northern Ireland with ambitions to become the leading Operations and Maintenance provider to ‘Distributed Wind Operators’ on the island of Ireland.


Acquired in 2020, Silverford provide Arena with additional maintenance capabilities in Northern Ireland. With an impressive track record on maintenance and a book of over 90 contracts. Silverford was a strong bolt on acquisition to WEP and positions the WEP Silverford combination as the leading maintenance provider to Endurance and WTN Turbines in Northern Ireland. Silverford has four qualified engineers and a workshop located in Bush, Dungannon where its operations are based.

Onshore Solar

Acquired in 2023, Onshore Solar supply and install domestic and commercial solar PV systems and ancillaries such as battery storage, energy diversion, system monitoring and export limiting.

Having merged our team with Natural Generation, Onshore are based in Cornwall.

Natural Generation

Natural Generation Ltd are a specialist company in the operations and maintenance of Wind Turbines and Solar Farms.

Incorporated in 2006 we started life as a small wind and solar  installer and over the next 6-7 years developed into a very successful SME business installing Turbines, Solar PV and other renewable energy technologies. With bases in Cornwall & Scotland, Nat Gen provide nationwide coverage.