Case Study

Clayhill – the UK’s first subsidy-free solar farm

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Project results:


subsidy-free solar farm in the UK


tonnes of CO2 saved annually


renewable energy generated

Project Outline:

Clayhill solar farm, located in Milton Keynes, was officially opened on 26 September 2017 by Claire Perry MP, the UK Minister for Climate Change & Industry.

It took 12 weeks to complete and combines the latest in solar and energy storage technology, with 10MW of solar PV co-located with 5 energy storage units totalling 6MW.

Anesco’s team navigated a range of technical and commercial complexities to achieve a subsidy-free development at Clayhill, utilising strong partnerships within the supply chain and reengineering the process of design and construction. Many design challenges were overcome by working with supply chain partners to find solutions.

One such development has been the use of a 1500v string inverter system – another first for the UK.  By finding a way to build a 1500v string inverter system, Anesco has been able to build solar without subsidy and this design is a major step change for the industry.

Key figures

  • The solar farm covers an area of 44.58 acres
  • It will generate enough to power 2,500 homes and save 4,452 tonnes of CO2
  • 31,240 solar panels totalling 10MW of solar PV have been installed
  • 5 energy storage units totalling 6MW have been co-located on the site
  • 135x 1500v solar inverters have been fitted – the first time they have been used in Europe
  • 15,620 metres of frames have been used

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