Before most commercial solar or battery systems can be switched on, the network operator must approve the connection. That approval is called G99, and BrightEdge Solar handles the G99 application for you.
See also: Commercial Battery Storage | Warehouse & Industrial Solar
The Energy Networks Association’s engineering recommendation that sets the rules for connecting generators, including solar PV inverters and batteries, to the electricity network in Great Britain.
G99 approval typically adds 8–12 weeks before installation. It can take longer where the network is constrained or the DNO asks questions.
We look at your supply capacity, existing meters and any existing G99 approvals. Then we size the solar, inverter and any battery, and decide whether export limitation is needed.
We prepare and submit the G99 application with the technical details, equipment data and single-line diagrams. The DNO studies the impact on the local network and responds with a connection offer.
The offer may approve your full export, approve it with an export limit, or require network work at a cost. We go through the options with you, then install once accepted.
The system is tested and commissioned to G99 requirements, and the paperwork is sent to the DNO. For larger systems the DNO may want to witness the tests.
The client wanted a SolarEdge system with a permanent roof safety line, using panels from the end client’s approved list. We installed 187 DMEGC 460 W all-black panels, covering about 370 m² of the profiled metal roof, on Clenergy trapezoidal rail laid out around the rooflights. The system runs on a SolarEdge SE66.6K Synergy inverter with S1200 optimisers (two panels per optimiser). We sized the inverter to fit the site’s existing G99 approval, which had been granted for an older 60 kW unit, and a SolarEdge ONE Commercial Controller handles G99/G100 export limitation. Emlite MID meters with 4G remote reading record generation. Temporary GRP covers protected the rooflights during the install, and we fitted a permanent 72 m Soter II Man-Safe lifeline for safe future access.
99 kWp rooftop solar on a warehouse, Oldham.
If it can export more than 16A per phase, yes. Almost every commercial system does.
Typically 8–12 weeks, sometimes longer on constrained networks. We start the application early.
We do, as part of the project. We also deal with any DNO queries.
If the combined system can export above the G98 limit, yes, or the DNO may need to be notified of the change. We check this for you.
The DNO may limit your export or ask for network upgrades. Export limitation or a battery can often make the project work within the limit.
Northern Powergrid covers Hull, East Yorkshire and much of the North East.
Send us a recent electricity bill and details of your supply, and we’ll tell you what’s likely to be involved in connecting solar or a battery at your site.
Call 01482 765063 · info@brightedgesolar.com
BrightEdge Solar Ltd, Colonial House, Swinemoor Lane, Beverley HU17 0LS. MCS certified (NIC-601602). RECC member.
