Grid connection: your Distribution Network Operator
Government guidance for device owners and installers, published 31 March 2021.
- Solar PV and battery storage must be registered with the local Distribution Network Operator (DNO), the company that brings electricity to the property. Source: Department for Energy Security and Net Zero, gov.uk, How to register energy devices (guidance, 31 March 2021). Read 17 Oct 2026
- The installer works out whether the connection is 'connect and notify' or 'apply to connect', using the Energy Networks Association's connection guides. Source: Department for Energy Security and Net Zero, gov.uk, How to register energy devices (guidance, 31 March 2021). Read 17 Oct 2026
- Connect and notify: install, then send the Engineering Recommendation G98 form to the DNO within 28 days of installation. Source: Department for Energy Security and Net Zero, gov.uk, How to register energy devices (guidance, 31 March 2021). Read 17 Oct 2026
- Apply to connect: send the G99 form (G100 if export is limited) before installing. The guidance says the DNO will be in touch within 45 days for low-voltage and 65 days for high-voltage devices. Source: Department for Energy Security and Net Zero, gov.uk, How to register energy devices (guidance, 31 March 2021). Read 17 Oct 2026
- A battery with generation that needs 'apply to connect' can use the fast-track G99 Form A1-2 for fully type-tested integrated microgeneration and storage: still before installation, in 10 days or less. Source: Department for Energy Security and Net Zero, gov.uk, How to register energy devices (guidance, 31 March 2021). Read 17 Oct 2026
- The owner must make sure the DNO has the notification and, for 'apply to connect', its authorisation before the work starts. Source: Department for Energy Security and Net Zero, gov.uk, How to register energy devices (guidance, 31 March 2021). Read 17 Oct 2026
- In England and Wales, an installer in a competent person scheme can usually self-certify building regulations; otherwise a building notice goes to Local Authority Building Control before work starts. In Scotland, the installer checks with the local authority's building standards service whether a building warrant is needed. Source: Department for Energy Security and Net Zero, gov.uk, How to register energy devices (guidance, 31 March 2021). Read 17 Oct 2026























