What is a turbine Supply agreement (TSA)?

The turbine supply agreement (TSA) is a critical component of the contractual framework for both onshore and offshore wind farms. This note analyses some of the key aspects of a TSA and how it fits into the wider contractual suite of agreements used to construct, operate and maintain a wind farm.

Wind farms consist of individual wind turbine generators (each a WTG) used to generate renewable power. Each WTG typically consists of a nacelle (which sits at the top of the WTG’s tower and houses the generating components), blades, tower and other critical components such as control and Data equipment, generator and switchgear.

The TSA will typically cover the design, construction and Delivery to site of these components, in addition to the Commissioning and performance of each WTG. The form of the TSA may be a bespoke form or amended standard form tailored to suit the specific requirements of wind turbine supply contracts.

Key provisions of a turbine supply agreement

The specific terms of the TSA will vary between