Solar panels for farms in Welwyn Garden City
Around Welwyn Garden City the constraint is rarely the roof. It is the incoming supply and what the network will accept back. What decides a farm scheme here is the state of the roof sheets and the incoming supply, which is why the survey looks at both before anyone sizes an array.
899 kWh per kWp a year at this latitude, so a 500 kWp array models at about 450,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Book a roof survey in Welwyn Garden CityIllustrative layout for a unit of this size. Your own figures come from the roof survey.
Agricultural rooftop solar across Hertfordshire
What a farm roof near Welwyn Garden City generates
Modelled irradiation at this latitude is 1152 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 899 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 areas we cover, so what decides the scheme is your own demand pattern rather than the latitude.
2 roof mounted schemes are on record nearby. Roof arrays under a megawatt frequently never reach that database at all, so the real number of farm roofs generating around Welwyn Garden City is higher than the record shows.
Most of the buildings we look at here sit in the AL postcode area.
Welwyn Hatfield is the planning authority for most holdings here, and it is the authority that decides whether an array on an agricultural building falls inside permitted development.
Welwyn Garden City ranks 6 of 10 towns we cover in Hertfordshire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 895 to 911, a spread of 16 kWh per kWp. Within Hertfordshire that difference is small enough to ignore: where the building sits is not what decides this scheme, your consumption pattern is.
Solar already consented near AL7
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 |
|---|---|---|---|---|
| Ridgeway Academy, Herns Lane - Solar Panels | Earthpoints Limited | 0.19 MW | Roof | Awaiting Construction |
| Morrisons Supermarket - Solar PV Array | Gondola Pro | 0.27 MW | Roof | Awaiting Construction |
Grid connection through UK Power Networks
UK Power Networks is the network operator here, and their answer on export capacity shapes the design. Any commercial array above 3.68 kW per phase connects under G99 rather than G98, and the application fixes what you are allowed to push back onto the network. If the local network is tight, limiting export rarely breaks the case here: most of the generation is consumed on site while the building is working.
Across Hertfordshire the planning database records 119 solar schemes totalling 844 MW, of which 12 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 Welwyn Garden City
- How much does a farm roof near Welwyn Garden City generate?
- The model gives 899 kWh for every kWp installed here, so 500 kWp comes out at about 450,000 kWh a year before shading losses. A building of roughly 1,485 sqm of clear roof carries it. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
- Will the rural network around Welwyn Garden City take the export?
- UK Power Networks is the distribution network operator for Hertfordshire. Anything above 3.68 kW per phase connects under G99, and the application sets the export limit. Rural supplies are often the binding constraint, so we ask the question before an array is sized.
- Is planning permission needed for panels on a farm building near Welwyn Garden City?
- Usually permitted development covers a roof array. Ground mounted arrays are a different question and are far more likely to need a full application. We put both to Welwyn Hatfield before design sign-off.
- Has anyone near AL7 already done this?
- The planning database records 0 ground mounted and 2 roof mounted solar schemes in this postcode district. That matters less as proof it works and more as evidence of how the local network has treated export applications. Roof arrays under a megawatt often never appear in the database, so the real figure is higher. Source: Renewable Energy Planning Database, Q1 2026.