What would a 500 kWp array produce in Bangor?

Yes, and the number matters more than the sunshine. At 733 kWh per kWp a year, a 500 kWp array on a Bangor roof models at around 367,000 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 Bangor?

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 Bangor

A Bangor 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.

733 kWh per kWp a year at this latitude, so a 500 kWp array models at about 367,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

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Drawing Bangor unit

Roof 96 x 62 m

Array 500 kWp

Yield 367,000 kWh/yr

Scale 1:500 / Rev A / Gwynedd

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

Bangor / 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.

Logistics solar PV across Gwynedd

What a roof in Bangor actually generates

Modelled irradiation at this latitude is 941 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 733 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is about 17 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 Bangor roof makes, month by month

Jun produces 9.2 times what Dec does on the same roof. A 500 kWp array here models at about 367,000 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	16	8,000
Feb	30	15,000
Mar	59	29,500
Apr	91	45,500
May	109	54,500
Jun	110	55,000
Jul	103	51,500
Aug	84	42,000
Sep	64	32,000
Oct	37	18,500
Nov	19	9,500
Dec	12	6,000

Source: EU PVGIS v5.2

FIG. 2 Bangor against the rest of Gwynedd

Pwllheli887
Porthmadog820
Caernarfon798
Dolgellau746
Bangor733
Bethesda704

Bangor ranks 5 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

SP Energy 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 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 Bangor

What would a 500 kWp array produce in Bangor?: Yes, and the number matters more than the sunshine. At 733 kWh per kWp a year, a 500 kWp array on a Bangor roof models at around 367,000 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 Bangor?: 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.