How much will solar panels produce in Ennis?

A 4 kWp system facing south at 35° tilt in Ennis produces about 3,751 kWh a year. In a weak year that is 3,135 kWh, in a good one 4,367 kWh — 938 kWh per kWp.

That’s about 89% of a typical home’s yearly use (4,200 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

0200400600JanJanuary: 4 kWp 125 kWh, range 96–153FebFebruary: 4 kWp 186 kWh, range 153–219MarMarch: 4 kWp 321 kWh, range 248–394AprApril: 4 kWp 431 kWh, range 322–540MayMay: 4 kWp 497 kWh, range 400–593JunJune: 4 kWp 471 kWh, range 378–564JulJuly: 4 kWp 442 kWh, range 367–516AugAugust: 4 kWp 415 kWh, range 340–490SepSeptember: 4 kWp 339 kWh, range 272–407OctOctober: 4 kWp 240 kWh, range 196–285NovNovember: 4 kWp 150 kWh, range 118–182DecDecember: 4 kWp 106 kWh, range 82–129

kWh per month

A typical day in May

The sunniest month in Ennis. Output peaks around 10:00 solar time, at about 1.8 kWh in the best hour.

0:006:0012:0018:0023:00 1.8 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 96 125 153
February 153 186 219
March 248 321 394
April 322 431 540
May 400 497 593
June 378 471 564
July 367 442 516
August 340 415 490
September 272 339 407
October 196 240 285
November 118 150 182
December 82 106 129
Year 3,135 3,751 4,367

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 Ennis?

From November to February the system produces about 566 kWh, which is 15% of the year. The weakest month (December) gives roughly 106 kWh.

Is an east-west roof worth it in Ennis?

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 Ennis

Ground mount or roof in Ennis?

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 Ennis

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