What Northern Powergrid covers
Northern Powergrid is the Distribution Network Operator responsible for Yorkshire, North East England, Lincolnshire (partial). The network covers the rural farming areas across West Yorkshire, South Yorkshire, North Yorkshire, East Riding, Durham, Tyne and Wear, Northumberland, North Lincolnshire. Every commercial farm PV install above approximately 17 kW within these areas connects via Northern Powergrid's G99 process.
The G99 application process via Northern Powergrid
The Northern Powergrid G99 application is submitted via their connections portal (https://www.northernpowergrid.com/connections). Standard timeline:
- Application submission: within 14 days of contract signature (your installer submits immediately after the structural survey)
Current capacity context across Northern Powergrid's network
North Pennines and remote Northumberland feeders capacity-constrained; East Riding and Vale of York generally available. For farms on capacity-constrained feeders, the rational design path is "no-export" — sizing the PV system for 100% self-consumption with zero grid export.
Northern Powergrid-specific G99 requirements
Northern Powergrid requires standard G99 documentation: system specification (panel and inverter make and model, total kW capacity); single-line electrical diagram; grid-code compliance certificate (inverter manufacturer certification); structural compliance confirmation; site address and grid reference; existing supply details (MPAN, contracted kVA, phase configuration). For installs above 250 kW, Northern Powergrid typically requires additional fault-level study and harmonic distortion analysis.
Connection charges to expect on Northern Powergrid's network
Indicative Northern Powergrid connection charges for typical farm PV installs in 2026:
For projects where the Northern Powergrid quote is uneconomic, we typically explore: reducing system capacity to fit within existing feeder limits; no-export design eliminating export reinforcement; battery storage to absorb peak generation; staged commissioning where Phase 1 connects under existing capacity.
How to minimise Northern Powergrid G99 timeline impact on your project
Three actions consistently shorten the G99 timeline:
- Submit early. A good installer submits the G99 application within 14 days of contract signature, before detailed electrical design completes. The application can be updated as design firms up; what matters is being in the Northern Powergrid queue.
- Pre-engage Northern Powergrid where possible. For larger installs (above 500 kW), informal pre-application discussions with the Northern Powergrid connections team can flag capacity constraints before formal submission, allowing design adjustments.
Working with Northern Powergrid on combined re-roof + PV projects
For projects involving asbestos cement removal followed by PV installation, the G99 application is submitted at the same time as the asbestos removal contractor mobilises. Both workstreams run in parallel through the re-clad and into commissioning. Northern Powergrid does not require coordination with the asbestos contractor — the G99 process is electrical-only.
What we do for Northern Powergrid G99 applications
Your installer handles G99 submission as part of every project scope. Specifically: we draft the G99 application from the structural and electrical design; your installer submits via the Northern Powergrid portal; we manage the study response and any queries from Northern Powergrid's technical team; the installer coordinates any contestable works planning; we manage the final connection commissioning with Northern Powergrid's site team.
Common questions
How long does Northern Powergrid take to approve a G99 connection?
The distribution network operator (DNO) is the company that owns the local network, set by the site’s location rather than the electricity supplier. It sets its own G99 study timescales and any reinforcement cost, so ask it for current figures in writing before relying on a programme; the process is covered in the guide to DNO grid connection for rural farm solar.
What's the G99 connection cost on Northern Powergrid's network?
There is no single price for an install of this kind. The official DESNZ series for 2025/26 gives a mean installed cost of £1,266.84 per kW for 10–50 kW systems (£1,167.29 for non-domestic installations in that band), but it covers MCS installations up to 50 kW across all building types, so larger farm systems are priced from written quotes. The farm solar cost guide sets out the series and what moves a farm quote.
Can we connect a farm PV system on a capacity-constrained Northern Powergrid feeder?
Yes — using no-export design. The PV system is sized for 100% self-consumption with zero grid export.
Does Northern Powergrid have special requirements for large farm installs?
For installs above 250 kW, Northern Powergrid typically requires additional fault-level study and harmonic distortion analysis. Above 1 MW, full grid-code compliance documentation. A competent installer handles these as part of standard scope.
When should we submit the G99 application to Northern Powergrid?
The distribution network operator (DNO) is the company that owns the local network, set by the site’s location rather than the electricity supplier. It sets its own G99 study timescales and any reinforcement cost, so ask it for current figures in writing before relying on a programme; the process is covered in the guide to DNO grid connection for rural farm solar.