How much will solar panels produce in Dundalk?

A 4 kWp system facing south at 35° tilt in Dundalk produces about 3,882 kWh a year. In a weak year that is 3,238 kWh, in a good one 4,526 kWh — 971 kWh per kWp.

That’s about 92% 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 120 kWh, range 93–147FebFebruary: 4 kWp 208 kWh, range 158–258MarMarch: 4 kWp 339 kWh, range 262–416AprApril: 4 kWp 435 kWh, range 332–539MayMay: 4 kWp 530 kWh, range 430–630JunJune: 4 kWp 481 kWh, range 376–586JulJuly: 4 kWp 464 kWh, range 383–545AugAugust: 4 kWp 440 kWh, range 358–523SepSeptember: 4 kWp 356 kWh, range 291–422OctOctober: 4 kWp 251 kWh, range 205–296NovNovember: 4 kWp 143 kWh, range 107–179DecDecember: 4 kWp 105 kWh, range 77–133

kWh per month

A typical day in May

The sunniest month in Dundalk. Output peaks around 12:00 solar time, at about 1.9 kWh in the best hour.

0:006:0012:0018:0023:00 1.9 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 93 120 147
February 158 208 258
March 262 339 416
April 332 435 539
May 430 530 630
June 376 481 586
July 383 464 545
August 358 440 523
September 291 356 422
October 205 251 296
November 107 143 179
December 77 105 133
Year 3,238 3,882 4,526

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 Dundalk?

From November to February the system produces about 576 kWh, which is 15% of the year. The weakest month (December) gives roughly 105 kWh.

Is an east-west roof worth it in Dundalk?

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 Dundalk

Ground mount or roof in Dundalk?

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 Dundalk

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