The Life of a Wind Farm: Build, Operate, Maintain, Repower

A wind farm lives through four phases: development and consent, construction and commissioning, operation and maintenance, and finally decommissioning or repowering. The headlines focus on the first two, but most of a project's climate value is created in the long, quiet third phase, when the turbines simply turn, year after year. Here is the whole journey.

Phase 1: Development and consent

Years before a single turbine appears, developers measure the wind with met masts and remote sensors, secure land or seabed rights, run environmental and community assessments, and apply for planning consent and a grid connection. This phase is slow by design, and it decides whether a project is viable at all.

Phase 2: Construction and commissioning

Once approved, roads and foundations go in, towers rise in sections, and large cranes lift the nacelle and blades into place. Each turbine is then commissioned, tested and energised, and the wind farm is connected through its collector network to a substation and the grid. For offshore projects this phase is far more complex, as we explain in onshore versus offshore wind.

Phase 3: Operation and maintenance (20 to 30 years)

This is where a wind farm earns its keep. For two to three decades the turbines generate electricity while operators keep them available through scheduled service, condition monitoring and corrective repairs. As our guest engineer argues in why maintenance decides the transition, the discipline of this phase, not the glamour of construction, determines how much clean energy a project actually delivers. Understanding how the machine works makes clear why so much attention goes into gearboxes, blades and pitch systems.

Phase 4: End of life, decommissioning or repowering

After 20 to 30 years an owner can decommission the site and restore the land, or repower it by replacing ageing turbines with fewer, larger and more efficient machines on the same grid connection. End of life also raises the question of materials: steel and copper recycle easily, while composite blades are the hard part, which is exactly the kind of circular-economy challenge we follow in from waste to resource.

From wind to waves and sun, the full picture of the transition lives in the Solutions library and across the web series.