BrightGridConnecting solar or battery generation to the electricity network involves technical requirements set by the Distribution Network Operator. The applicable process depends on the size and characteristics of the proposed generating equipment.
What is a DNO?
The Distribution Network Operator manages the local electricity distribution network. When generation is connected to that network, the DNO needs sufficient information to determine whether the connection is technically acceptable.
What is G98?
G98 is associated with certain smaller-scale generation connections that meet the applicable technical requirements. The installer follows the relevant notification process rather than treating every installation as a full connection application.
What is G99?
G99 applies to larger or otherwise relevant generation connections where a more detailed connection process may be required. The DNO may assess the proposed generation and network conditions.
What is G100?
G100 relates to export limitation schemes. Export limitation can restrict how much power a generating system sends to the grid where network constraints or connection requirements make this necessary.
| Standard | General purpose |
|---|---|
| G98 | Applicable smaller-scale generation connections meeting requirements |
| G99 | More substantial or relevant generation connections |
| G100 | Export limitation systems |
Why DNO approval matters
The DNO process can affect the system design, equipment selection, export capability and project timeline. It is therefore important to consider grid requirements early.
Do not assume every solar installation follows the same process
The applicable requirements depend on the proposed generation and connection characteristics. Your installer should identify the relevant DNO process for the project.
Planning a larger solar installation?
We can assess the electrical design and identify the grid-connection requirements for your project.
Discuss Your ProjectFrequently asked questions
What is DNO approval for solar?
It is the process used to ensure a solar or battery generating system can connect to the local electricity distribution network under the applicable technical requirements.
What is the difference between G98 and G99?
G98 generally covers qualifying smaller generation connections, while G99 applies to larger or otherwise relevant generation connections requiring a more detailed process.
What is G100?
G100 concerns export limitation systems that control how much electricity a generator can export to the network.
Does my home solar system need DNO approval?
The applicable notification or application depends on the system and connection characteristics. Your installer should confirm the correct process.
Marcus Webb
Head of Engineering at BrightGrid Energy
