The free tool for UK solar installers and homeowners to check local substation capacity for solar panels, battery storage, and EV charger installations.
Check Your Postcode FreeBefore installing solar panels, a home battery, or an EV charger, you need to know whether your local electricity grid can handle the extra load. Every neighbourhood is fed by a substation with a fixed capacity — if it's already heavily loaded, a new installation could cause voltage issues or require expensive reinforcement work.
GridCheck lets you enter any UK postcode and instantly see the capacity status of the nearest substation. You get a clear Red, Amber, or Green rating so you know whether to proceed, investigate further, or quote for grid reinforcement costs.
For professional installers, GridCheck saves time on every quote. Instead of manually searching DNO open data portals, you get the answer in seconds — and can generate your G98 or G99 DNO notification form right from the results.
Enter a UK postcode and get the capacity status of the nearest substation in seconds. See utilisation bands, demand headroom, and customer counts.
Automatically generate pre-filled G98 Form B or G99 Form A for your DNO. Download as PDF or have it emailed directly to you.
Live data from UK Power Networks and Scottish & Southern Electricity Networks. Coverage includes London, South East, East of England, and SSEN regions.
If you install solar PV, battery storage, EV chargers, or vehicle-to-grid systems, you know the headache of DNO notifications. GridCheck streamlines the entire process from initial site assessment to submitting the right paperwork.
Thinking about installing solar panels, a home battery, or an EV charger? GridCheck helps you understand whether your local grid can support it — before you get quotes from installers.
A grid capacity check tells you how much spare electrical capacity your local substation has. This determines whether new solar panels, battery storage, or EV chargers can be connected without costly grid reinforcement.
If your installation is 3.68 kW or less per phase (most domestic solar), you need a G98 Form B — a simple notification to your DNO after installation. If it exceeds 3.68 kW per phase, you need a G99 Form A, which requires DNO approval before installation can begin.
GridCheck currently covers UK Power Networks (UKPN) areas including London, South East, and East of England, as well as Scottish & Southern Electricity Networks (SSEN) areas. We're expanding to additional DNO regions.
Yes, basic grid capacity checks are completely free. GridCheck Pro provides extra detail including substation utilisation data, demand headroom figures, and automatic G98/G99 form generation.
GridCheck pulls data directly from DNO open data APIs (UKPN and SSEN). The substation capacity and utilisation data reflects the latest published figures from your distribution network operator.
A DNO (Distribution Network Operator) owns and operates the local electricity grid in your area. UK regulations require that any new generation equipment (solar panels, batteries) is notified to or approved by the DNO to ensure grid safety and stability.
Enter your installation postcode and get a capacity rating in seconds. Free for installers and homeowners.
Check Your Postcode Now