--- title: UK Grid Connection Process Explained (Step-by-Step) description: A step-by-step guide to the UK grid connection process, including G98, G99, DNO applications, costs, and timelines for renewable and commercial projects. image: https://www.rpconnections.co.uk/hubfs/AI-Generated%20Media/Images/image-2.jpeg --- [Skip to content](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#main-content) Renewable Power Connections - [Services](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#services) - [Blog](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#blog) - [About](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#about) - [Services](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#services) - [Blog](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#blog) - [About](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#about) ![](https://www.rpconnections.co.uk/hs-fs/hubfs/AI-Generated%20Media/Images/image-2.jpeg?width=1344&height=768&name=image-2.jpeg) # UK Grid Connection Process Explained (Step-by-Step) ![Renewable Power Connections](https://7528315.fs1.hubspotusercontent-na1.net/hub/7528315/hubfs/raw_assets/public/mV0_d-cms-elevate-theme_hubspot/elevate/images/avatar-placeholder.jpg?width=48&height=48&name=avatar-placeholder.jpg) Renewable Power Connections March 24, 2026 The UK grid connection process involves applying to a Distribution Network Operator (DNO) or National Grid, receiving a formal connection offer, and completing any required infrastructure works before energisation. For most projects, the process takes between 12 and 36 months depending on complexity and grid constraints. ## Key Stages ### 1. Feasibility & Site Assessment - Identify connection points - Assess available capacity ### 2. Application Submission - G98 (small systems) - G99 (larger generation projects) ### 3. Connection Offer - Costs - Timeline - Required works ### 4. Acceptance - Payment of fees - Securing queue position ### 5. Design & Construction - Substations - Cabling - Reinforcement works ### 6. Testing & Energisation - Compliance checks - Final connection ## DNO vs IDNO vs National Grid - **DNOs (Distribution Network Operators)**: Own and operate the regional electricity distribution networks and issue connection offers. - **IDNOs (Independent Distribution Network Operators)**: Privately owned network operators that can adopt and operate new network assets (e.g. contestable works) and, in some cases, provide alternative points of connection via their networks. - **National Grid (Transmission Operator)**: Manages the high-voltage transmission network for large-scale connections. **Why IDNOs matter:** - Can **adopt contestable assets** delivered by a NERS accredited ICP, potentially reducing long-term liabilities for developers. - May offer **alternative connection routes** where DNO capacity is constrained. - Can improve **commercial flexibility** on certain projects. ## Common Challenges - Grid capacity shortages - Long queue times - High reinforcement costs ## Industry Insight Many projects stall after receiving a connection offer due to unexpected reinforcement costs or planning delays. ## FAQs **What is a grid connection offer?** A formal document outlining how your project can connect, including costs and timelines. **What is the difference between G98 and G99?** G98 applies to smaller systems; G99 is required for larger or more complex generation. **Can I use an ICP instead of a DNO?** Yes, NERS accredited ICPs can design and deliver much of the connection infrastructure. ## Share this post [mailto:https%3A%2F%2Fwww.rpconnections.co.uk%2Fblog%2Fuk-grid-connection-process-explained-step-by-step](mailto:https%3A%2F%2Fwww.rpconnections.co.uk%2Fblog%2Fuk-grid-connection-process-explained-step-by-step) ## Keep reading ### [![](https://www.rpconnections.co.uk/hs-fs/hubfs/AI-Generated%20Media/Images/image.jpeg?width=1344&height=768&name=image.jpeg) DNO vs IDNO vs ICP – What’s the Difference?](https://www.rpconnections.co.uk/blog/dno-vs-idno-vs-icp-whats-the-difference) ### [![](https://www.rpconnections.co.uk/hs-fs/hubfs/AI-Generated%20Media/Images/group_logos-logo_three.jpeg?width=1344&height=768&name=group_logos-logo_three.jpeg) How Long Does a Grid Connection Take in the UK?](https://www.rpconnections.co.uk/blog/how-long-does-a-grid-connection-take-in-the-uk) # Renewable Power Connections - [Services](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#services) - [Blog](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#blog) - [About](https://www.rpconnections.co.uk/blog/uk-grid-connection-process-explained-step-by-step#about) --- Privacy Policy · Legal · © 2026 Renewable Power Connections. 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