The GLIL is a joint venture between the London Pensions Fund Authority and the Greater Manchester Pension Fund.
Proceeds from the sale will be used by SSE to support future investments in a balanced range of energy assets.
SSE wholesale managing director Martin Pibworth said: "We are pleased to confirm the sale of a stake in our flagship Clyde wind farm to UKW and GLIL.
"The sale represents another significant step in a programme of disposals to recycle capital and optimise our wind farm pipeline."
The divestment of non-core assets, including existing or in-development onshore wind farms, is part of SSE’s plan to reduce its debt of £1bn.
SSE is developing the 172.8MW extension to the Clyde wind farm. Upon completion by June 2017, the extension wind farm would reduce the stake of the buyers’ to 30%.
Under the terms of the deal, Greencoat UK would hold a 28.2% stake in the wind farm while GLIL owns 21.7% interest.
SSE will be responsible for providing long term management services for all 522.4MW as well as long term route to market power purchase agreements.
Additionally, Siemens will provide long-term turbine operations and maintenance services.
The latest deal is planned to be completed on 18 March, Reuters reported.
Image: The Clyde wind farm is located in South Lanarkshire. Photo: courtesy of SSE.
