How much will solar panels produce in Bray?

A 4 kWp system facing south at 35° tilt in Bray produces about 3,936 kWh a year. In a weak year that is 3,286 kWh, in a good one 4,585 kWh — 984 kWh per kWp.

That’s about 94% of a typical home’s yearly use (4,200 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

0200400600800JanJanuary: 4 kWp 137 kWh, range 104–169FebFebruary: 4 kWp 213 kWh, range 172–254MarMarch: 4 kWp 332 kWh, range 254–410AprApril: 4 kWp 452 kWh, range 358–547MayMay: 4 kWp 538 kWh, range 428–648JunJune: 4 kWp 514 kWh, range 403–624JulJuly: 4 kWp 476 kWh, range 379–573AugAugust: 4 kWp 421 kWh, range 343–499SepSeptember: 4 kWp 357 kWh, range 293–421OctOctober: 4 kWp 249 kWh, range 204–294NovNovember: 4 kWp 140 kWh, range 105–176DecDecember: 4 kWp 106 kWh, range 80–132

kWh per month

A typical day in May

The sunniest month in Bray. Output peaks around 12:00 solar time, at about 2.0 kWh in the best hour.

0:006:0012:0018:0023:00 2.0 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 104 137 169
February 172 213 254
March 254 332 410
April 358 452 547
May 428 538 648
June 403 514 624
July 379 476 573
August 343 421 499
September 293 357 421
October 204 249 294
November 105 140 176
December 80 106 132
Year 3,286 3,936 4,585

The months don’t add up exactly to the yearly figure, because each one is the typical value across many years.

Common questions

How much do solar panels produce in winter in Bray?

From November to February the system produces about 596 kWh, which is 15% of the year. The weakest month (December) gives roughly 106 kWh.

Is an east-west roof worth it in Bray?

An east-west system typically produces 10–25% less per kWp than one facing south, but spreads production more evenly through the day. The exact difference depends on tilt and shading.

Compare an east-west roof for Bray

Ground mount or roof in Bray?

A ground mount can be tilted and aimed freely, which can add some yield, but it costs more and needs space. Compare both for your own plot.

Check a ground-mounted system in Bray

Your roof is not an average roof

Set your own tilt, direction, shading and inverter limit and get a range for your address.

Calculate for my roof

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Climate data: Photovoltaic Geographical Information System (PVGIS) — European Commission, Joint Research Centre