Export limitation restricts how much electricity a solar or battery system can send to the grid, required when local network capacity is constrained.
Export limitation is a technical requirement imposed by DNOs when the local electricity network cannot accept the full export capacity of a generation system. A device limits the power exported to the grid.
DNOs may require export limitation when:
When export limitation is required, installers must:
| Item | Typical Cost |
|---|---|
| G100 application | Free - included in G99 |
| Export limitation device | Included in inverter or separate unit |
Export limitation affects:
G99 is the engineering recommendation governing the connection of generation equipment to distribution networks, requiring DNO approval for systems over 16A per phase.
Distribution Network Operators own and operate the local electricity distribution networks that deliver power from the national grid to homes and businesses.
Solar photovoltaic systems convert sunlight directly into electricity using semiconductor cells, enabling homes and businesses to generate their own renewable power.
Battery energy storage systems store electricity for later use, commonly paired with solar PV to maximise self-consumption and provide backup power.