How much will solar panels produce in Killarney?

A 4 kWp system facing south at 35° tilt in Killarney produces about 3,513 kWh a year. In a weak year that is 2,919 kWh, in a good one 4,107 kWh — 878 kWh per kWp.

That’s about 84% of a typical home’s yearly use (4,200 kWh).

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Based on 2014–2023 satellite weather data

Production by month

0200400600JanJanuary: 4 kWp 113 kWh, range 84–142FebFebruary: 4 kWp 161 kWh, range 131–190MarMarch: 4 kWp 279 kWh, range 217–341AprApril: 4 kWp 398 kWh, range 292–503MayMay: 4 kWp 452 kWh, range 354–549JunJune: 4 kWp 439 kWh, range 337–541JulJuly: 4 kWp 430 kWh, range 353–508AugAugust: 4 kWp 401 kWh, range 326–476SepSeptember: 4 kWp 316 kWh, range 251–381OctOctober: 4 kWp 216 kWh, range 167–265NovNovember: 4 kWp 130 kWh, range 103–157DecDecember: 4 kWp 86 kWh, range 61–111

kWh per month

A typical day in May

The sunniest month in Killarney. Output peaks around 11:00 solar time, at about 1.6 kWh in the best hour.

0:006:0012:0018:0023:00 1.6 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 84 113 142
February 131 161 190
March 217 279 341
April 292 398 503
May 354 452 549
June 337 439 541
July 353 430 508
August 326 401 476
September 251 316 381
October 167 216 265
November 103 130 157
December 61 86 111
Year 2,919 3,513 4,107

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 Killarney?

From November to February the system produces about 490 kWh, which is 14% of the year. The weakest month (December) gives roughly 86 kWh.

Is an east-west roof worth it in Killarney?

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 Killarney

Ground mount or roof in Killarney?

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 Killarney

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