What would a 500 kWp array produce in Welshpool?

Yes, and the number matters more than the sunshine. At 831 kWh per kWp a year, a 500 kWp array on a Welshpool roof models at around 416,000 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 Welshpool?

Applications go to National Grid Electricity Distribution, who run the network across Powys. They decide the export limit, and we handle the G99 paperwork alongside the array design.

Solar panels for warehouses in Welshpool

A Welshpool warehouse roof sits idle through exactly the hours its occupier buys the most expensive electricity. We start with the covering and the structure, because a roof with five years left in it changes the answer entirely.

831 kWh per kWp a year at this latitude, so a 500 kWp array models at about 416,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Book a roof survey in Welshpool

Drawing Welshpool unit

Roof 96 x 62 m

Array 500 kWp

Yield 416,000 kWh/yr

Scale 1:500 / Rev A / Powys

Illustrative layout for a unit of this size. Your own figures come from the roof survey.

Welshpool / Powys

Aerial view of an industrial estate where some warehouse roofs carry solar arrays and others are bare steel — Industrial stock of the kind we survey across Powys.

Logistics solar PV across Powys

What a roof in Welshpool actually generates

Modelled irradiation at this latitude is 1061 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 831 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is about 6 percent below the mean across the towns we cover, so the case here leans harder on how much you use on site rather than on raw generation.

FIG. 1 What a Welshpool roof makes, month by month

Jun produces 6.9 times what Dec does on the same roof. A 500 kWp array here models at about 416,000 kWh across the year, but it arrives unevenly, which is why we size against your summer daytime load and then look at whether storage is worth adding for the shoulder months.

Monthly figures as a table

Month	kWh per kWp	500 kWp array
Jan	20	10,000
Feb	36	18,000
Mar	68	34,000
Apr	100	50,000
May	116	58,000
Jun	117	58,500
Jul	115	57,500
Aug	97	48,500
Sep	76	38,000
Oct	46	23,000
Nov	25	12,500
Dec	17	8,500

Source: EU PVGIS v5.2

FIG. 2 Welshpool against the rest of Powys

Hay on Wye838
Welshpool831
Builth Wells830
Brecon828
Llandrindod Wells825
Newtown820

Welshpool ranks 2 of 6 towns we cover in Powys on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 820 to 838, a spread of 18 kWh per kWp. Within Powys that difference is small enough to ignore: where the building sits is not what decides this scheme, your consumption pattern is.

Bars are zero based, so length is proportional to the figure. Where a county is flat, that is the finding: location is not the lever, consumption is. Source: EU PVGIS v5.2, modelled per town

Grid connection through National Grid Electricity Distribution

Connections around Welshpool are handled by National Grid Electricity Distribution, which sets the export limit for the site. Above 3.68 kW per phase the connection runs under G99, so the export limit is agreed in advance rather than assumed. Where the local network is constrained, an export-limited connection usually still makes the scheme work, because a warehouse uses most of what the roof makes during the working day.

Across Powys the planning database records 18 solar schemes totalling 39 MW, of which 1 are operational (REPD Q1 2026).

Book the survey

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 Welshpool

What would a 500 kWp array produce in Welshpool?: Yes, and the number matters more than the sunshine. At 831 kWh per kWp a year, a 500 kWp array on a Welshpool roof models at around 416,000 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 Welshpool?: Applications go to National Grid Electricity Distribution, who run the network across Powys. They decide the export limit, and we handle the G99 paperwork alongside the array design.