How much will solar panels produce in Wexford?

A 4 kWp system facing south at 35° tilt in Wexford produces about 4,249 kWh a year. In a weak year that is 3,543 kWh, in a good one 4,955 kWh — 1,062 kWh per kWp.

That’s about 101% of a typical home’s yearly use (4,200 kWh).

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Based on 2014–2023 satellite weather data

Production by month

0200400600800JanJanuary: 4 kWp 142 kWh, range 109–176FebFebruary: 4 kWp 228 kWh, range 183–273MarMarch: 4 kWp 341 kWh, range 256–426AprApril: 4 kWp 465 kWh, range 367–562MayMay: 4 kWp 557 kWh, range 451–663JunJune: 4 kWp 558 kWh, range 444–672JulJuly: 4 kWp 546 kWh, range 442–651AugAugust: 4 kWp 477 kWh, range 388–567SepSeptember: 4 kWp 375 kWh, range 291–458OctOctober: 4 kWp 269 kWh, range 210–327NovNovember: 4 kWp 168 kWh, range 126–210DecDecember: 4 kWp 117 kWh, range 84–150

kWh per month

A typical day in June

The sunniest month in Wexford. Output peaks around 12:00 solar time, at about 2.3 kWh in the best hour.

0:006:0012:0018:0023:00 2.3 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 109 142 176
February 183 228 273
March 256 341 426
April 367 465 562
May 451 557 663
June 444 558 672
July 442 546 651
August 388 477 567
September 291 375 458
October 210 269 327
November 126 168 210
December 84 117 150
Year 3,543 4,249 4,955

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 Wexford?

From November to February the system produces about 655 kWh, which is 15% of the year. The weakest month (December) gives roughly 117 kWh.

Is an east-west roof worth it in Wexford?

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 Wexford

Ground mount or roof in Wexford?

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 Wexford

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