Understanding the DNO process for your solar installation
When you agree to install solar panels, or a solar and battery system, one of the technical steps involved is the Distribution Network Operator (DNO) application.
A DNO is a standard requirement for connecting new generation systems to the UK electricity network. It ensures that your system can safely operate alongside the existing grid infrastructure.
What is a DNO?
A Distribution Network Operator (DNO) is the company responsible for the electricity cables and infrastructure that deliver power to homes in your area.
They are not your energy supplier. Instead, they manage the physical electricity network and ensure it remains safe and reliable as more homes begin generating their own electricity.
Because solar systems can export excess electricity back to the grid, the DNO must confirm that the local network can safely handle this additional power.
What happens during the dno process?
1. Identifying the correct application type (g98 or g99)
There are two types of applications depending on the size of the system.
G98 applications
Most typical domestic solar installations fall under G98. In these cases, installation can proceed and the DNO is formally notified after the system has been installed and commissioned.
G99 applications
Larger systems, or systems that combine solar panels with battery storage, may require a G99 application. These systems must receive approval from the DNO before installation begins because they have a greater potential impact on the local electricity network.
2. Next Energy submits the application
You do not need to complete any forms or contact the DNO directly.
Next Energy prepares the application using the technical specifications of your system and submits it on your behalf. We manage the communication with the DNO throughout the process.
3. approval and timing
For most homes installing solar under G98, the installation can proceed without waiting for approval. The system is installed and the DNO is notified once it is operational.
For G99 applications, approval may take several weeks depending on the capacity of the local electricity network. If this applies to your installation, we will keep you informed of progress throughout the process.
Why the DNO process matters
The DNO application ensures that:
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your system is safely connected to the electricity network
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the installation complies with UK regulations
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the local grid remains stable as more homes generate electricity.
You can think of the DNO process as a safety check that ensures your solar system works properly with the wider electricity network.
The good news
For most domestic solar installations, the process is straightforward and approvals are routine. Next Energy manages the entire process on your behalf so you don’t need to worry about the technical details.
If you have any questions about the DNO process or how it applies to your system, our team will be happy to explain it further.