How much will solar panels produce in Dunedin?

A 5 kWp system facing north at 35° tilt in Dunedin produces about 6,929 kWh a year. In a weak year that is 5,797 kWh, in a good one 8,061 kWh — 1,386 kWh per kWp.

That’s about 99% of a typical home’s yearly use (7,000 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

02505007501,000JanJanuary: 5 kWp 750 kWh, range 609–892FebFebruary: 5 kWp 697 kWh, range 570–825MarMarch: 5 kWp 639 kWh, range 529–750AprApril: 5 kWp 485 kWh, range 386–585MayMay: 5 kWp 393 kWh, range 315–472JunJune: 5 kWp 297 kWh, range 232–363JulJuly: 5 kWp 335 kWh, range 260–409AugAugust: 5 kWp 473 kWh, range 393–554SepSeptember: 5 kWp 598 kWh, range 492–704OctOctober: 5 kWp 717 kWh, range 586–848NovNovember: 5 kWp 756 kWh, range 619–894DecDecember: 5 kWp 769 kWh, range 636–902

kWh per month

A typical day in December

The sunniest month in Dunedin. Output peaks around 11:00 solar time, at about 3.2 kWh in the best hour.

0:006:0012:0018:0023:00 3.2 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 609 750 892
February 570 697 825
March 529 639 750
April 386 485 585
May 315 393 472
June 232 297 363
July 260 335 409
August 393 473 554
September 492 598 704
October 586 717 848
November 619 756 894
December 636 769 902
Year 5,797 6,929 8,061

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 Dunedin?

From May to August the system produces about 1,499 kWh, which is 22% of the year. The weakest month (June) gives roughly 297 kWh.

Is an east-west roof worth it in Dunedin?

An east-west system typically produces 10–25% less per kWp than one facing north, but spreads production more evenly through the day. The exact difference depends on tilt and shading.

Compare an east-west roof for Dunedin

Ground mount or roof in Dunedin?

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 Dunedin

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