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Stay Compliant. Stay Connected.

Connecting generators or CHP systems to the UK electricity grid requires strict compliance with G99 regulations. Shenton Group provides expert guidance and solutions to ensure your power systems meet all requirements, avoiding costly delays and penalties.

What is G99?

G99 is the UK standard for the connection of generation equipment – including generators and CHP systems – to the public electricity network. It sets out technical and operational requirements to ensure safety, stability, and reliability when integrating with the grid.

Why G99 Compliance Matters

Failure to comply with G99 can result in:

  • Delayed grid connection
  • Increased costs
  • Risk of disconnection or fines

Our team ensures full compliance from design through commissioning, giving you peace of mind and uninterrupted power.

Our G99 Services

  • Application Support
    We manage the entire G99 application process with your Distribution Network Operator (DNO).

  • Technical Compliance
    Detailed engineering checks to meet voltage, frequency, and protection requirements.

  • Documentation & Testing
    Complete paperwork and on-site testing for certification.

  • End-to-End Project Management
    From initial design to final approval, we handle everything.


Ready to Ensure Compliance?
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Our FAQ’s

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    Derek Sidaway – Sedgwick International UK

    Professional, efficient, courteous, I cannot praise the company and the staff enough. Our project was to remove a generator and associated control equipment from site, couldn’t have gone any smoother!
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    Andy Hughes, Chief Technology Officer – Intelligence Hosting Services Limited

    After having major issues with a so called “Generator Specialist” we needed to find a company that was competent in ensuring our backup power facilities were installed correctly as well as safe. After speaking with Shenton Group over the phone, an initial site survey was carried out along with the works that were needed to … Continued
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    Paul Hamblyn – Managing Director and Chief Operating Officer of EuroSite Power.

    Shenton Group have been a trusted partner since 2012. Their knowledge of the TEDOM CHP product proved invaluable when commissioning this complex project for CEFAS (Centre for Environment, Fisheries and Aquaculture Science), helping us to achieve the objectives set by our client.”