How much will solar panels produce in Dublin?

A 4 kWp system facing south at 35° tilt in Dublin produces about 3,956 kWh a year. In a weak year that is 3,297 kWh, in a good one 4,616 kWh — 989 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 143 kWh, range 109–177FebFebruary: 4 kWp 220 kWh, range 173–266MarMarch: 4 kWp 348 kWh, range 278–419AprApril: 4 kWp 443 kWh, range 342–543MayMay: 4 kWp 530 kWh, range 414–645JunJune: 4 kWp 493 kWh, range 395–591JulJuly: 4 kWp 467 kWh, range 383–550AugAugust: 4 kWp 429 kWh, range 347–511SepSeptember: 4 kWp 363 kWh, range 295–432OctOctober: 4 kWp 259 kWh, range 208–310NovNovember: 4 kWp 156 kWh, range 116–197DecDecember: 4 kWp 120 kWh, range 90–149

kWh per month

A typical day in May

The sunniest month in Dublin. 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 109 143 177
February 173 220 266
March 278 348 419
April 342 443 543
May 414 530 645
June 395 493 591
July 383 467 550
August 347 429 511
September 295 363 432
October 208 259 310
November 116 156 197
December 90 120 149
Year 3,297 3,956 4,616

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 Dublin?

From November to February the system produces about 639 kWh, which is 16% of the year. The weakest month (December) gives roughly 120 kWh.

Is an east-west roof worth it in Dublin?

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 Dublin

Ground mount or roof in Dublin?

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 Dublin

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

All cities in Ireland

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