What would a 500 kWp array produce in Pwllheli?

Yes, and the number matters more than the sunshine. At 887 kWh per kWp a year, a 500 kWp array on a Pwllheli roof models at around 444,000 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 Pwllheli?

Applications go to SP Energy Networks, who run the network across Gwynedd. They decide the export limit, and we handle the G99 paperwork alongside the array design.

Solar panels for warehouses in Pwllheli

Sheds around Pwllheli tend to have more roof than the business has any other use for. What decides a scheme here is the state of the covering and the load path, which is why the survey starts on the roof rather than in a spreadsheet.

887 kWh per kWp a year at this latitude, so a 500 kWp array models at about 444,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Book a roof survey in Pwllheli

Drawing Pwllheli unit

Roof 96 x 62 m

Array 500 kWp

Yield 444,000 kWh/yr

Scale 1:500 / Rev A / Gwynedd

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

Pwllheli / Gwynedd

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 Gwynedd.

Distribution centre solar across Gwynedd

What a roof in Pwllheli actually generates

Modelled irradiation at this latitude is 1120 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 887 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.

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

Jun produces 8.2 times what Dec does on the same roof. A 500 kWp array here models at about 444,000 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	21	10,500
Feb	37	18,500
Mar	72	36,000
Apr	105	52,500
May	129	64,500
Jun	131	65,500
Jul	124	62,000
Aug	105	52,500
Sep	77	38,500
Oct	46	23,000
Nov	24	12,000
Dec	16	8,000

Source: EU PVGIS v5.2

FIG. 2 Pwllheli against the rest of Gwynedd

Pwllheli887
Porthmadog820
Caernarfon798
Dolgellau746
Bangor733
Bethesda704

Pwllheli ranks 1 of 6 towns we cover in Gwynedd on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 704 to 887, a spread of 183 kWh per kWp. On a 500 kWp array that is about 91,500 kWh a year between the strongest and weakest town in the county.

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 SP Energy Networks

Connections around Pwllheli are handled by SP Energy Networks, 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 Gwynedd the planning database records 19 solar schemes totalling 221 MW, of which 6 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 Pwllheli

What would a 500 kWp array produce in Pwllheli?: Yes, and the number matters more than the sunshine. At 887 kWh per kWp a year, a 500 kWp array on a Pwllheli roof models at around 444,000 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 Pwllheli?: Applications go to SP Energy Networks, who run the network across Gwynedd. They decide the export limit, and we handle the G99 paperwork alongside the array design.