Solar panels for warehouses in Grantham
The economics of a Grantham rooftop array turn on how much of the generation the occupier uses on site. The survey measures the roof, not the postcode: cladding profile, purlin centres, remaining sheet life and the load the frame can take.
886 kWh per kWp a year at this latitude, so a 500 kWp array models at about 443,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Book a roof survey in GranthamIllustrative layout for a unit of this size. Your own figures come from the roof survey.
Warehouse rooftop solar across Lincolnshire
What a roof in Grantham actually generates
Modelled irradiation at this latitude is 1130 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 886 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That sits within a few percent of the mean across the towns we cover, so the case rests on your consumption pattern rather than on the weather.
Distribution stock around Grantham clusters on A1, A52 and A607, which is where the large single-let roofs are.
Most of the units we look at here sit in the NG postcode area.
South Kesteven is the planning authority for most sites here, and the built-up area holds a population of about 44,905, so the stock here runs to trade counters, light industrial terraces and the occasional larger shed (ONS Census 2021 built-up areas).
Grantham ranks 6 of 8 towns we cover in Lincolnshire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 861 to 906, a spread of 45 kWh per kWp. On a 500 kWp array that is about 22,500 kWh a year between the strongest and weakest town in the county.
Solar already consented near NG31
From the government's Renewable Energy Planning Database, Q1 2026. These are the schemes on record in this postcode district, which is a fair guide to how the local network has been treating export applications.
| Scheme | Operator | Capacity | Mounting | Status |
|---|---|---|---|---|
| Gonerby Moor, Great Gonerby - Solar Farm | Lightsource BP | 49.99 MW | Ground | Awaiting Construction |
| BGB Engineering Limited - Solar Panels Scheme | BGB Innovation | 0.21 MW | Roof | Awaiting Construction |
| Ash Tree Solar Farm & Battery Storage | Low Carbon Limited | 49.9 MW | Ground | Awaiting Construction |
| Grantham Meres Leisure Centre, Trent Road - Solar PV Panels | South Kesteven District Council | 0.2 MW | Roof | Application Submitted |
| Grantham Meres Leisure Centre, Trent Road - Solar PV System | Grantham Meres Leisure Centre | 0.25 MW | Roof | Application Submitted |
| MV Fruehauf Limited, Houghton Road - Solar Panels | MV Fruehauf Limited | 0.48 MW | Roof | Application Submitted |
Grid connection through National Grid Electricity Distribution
National Grid Electricity Distribution operates the distribution network across Lincolnshire, so the export application goes to them. Anything larger than 3.68 kW per phase falls under G99, which means an application before commissioning rather than a notification afterwards. A constrained network is not the end of a scheme. Capping export costs little when the building already absorbs most of what the roof produces.
Across Lincolnshire the planning database records 226 solar schemes totalling 7052 MW, of which 37 are operational (REPD Q1 2026).
Send us the postcode
Tell us where the unit is and roughly how big the roof is. We come back with what it can carry, what it would generate against your consumption, and the three ways to pay for it.
Lenzie Consulting Ltd arranges the survey and passes your details to our MCS-certified installation partner so they can quote.
Questions about solar in Grantham
- What would a 500 kWp array produce in Grantham?
- Yes, and the number matters more than the sunshine. At 886 kWh per kWp a year, a 500 kWp array on a Grantham roof models at around 443,000 kWh. What changes the answer is how much of that you use on site rather than export. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
- Which network operator handles the connection in Grantham?
- Applications go to National Grid Electricity Distribution, who run the network across Lincolnshire. They decide the export limit, and we handle the G99 paperwork alongside the array design.
- What does South Kesteven require for rooftop solar?
- Roof-mounted panels on a commercial building usually fall under permitted development, subject to the limits on projection above the roof plane and to the building not being listed or in a conservation area. We confirm the position with South Kesteven before the design is finalised.
- Has anyone near NG31 already done this?
- The planning database records 6 solar schemes in this postcode district, 4 of them roof mounted. That matters less as proof that it works and more as evidence of how the local network has been treating export applications. Source: Renewable Energy Planning Database, Q1 2026.