How much will solar panels produce in Oamaru?

A 5 kWp system facing north at 35° tilt in Oamaru produces about 7,053 kWh a year. In a weak year that is 5,882 kWh, in a good one 8,224 kWh — 1,411 kWh per kWp.

That’s about 101% 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 759 kWh, range 621–897FebFebruary: 5 kWp 692 kWh, range 550–834MarMarch: 5 kWp 644 kWh, range 535–752AprApril: 5 kWp 528 kWh, range 405–651MayMay: 5 kWp 437 kWh, range 353–521JunJune: 5 kWp 324 kWh, range 247–400JulJuly: 5 kWp 388 kWh, range 302–473AugAugust: 5 kWp 496 kWh, range 401–591SepSeptember: 5 kWp 631 kWh, range 498–763OctOctober: 5 kWp 708 kWh, range 563–853NovNovember: 5 kWp 739 kWh, range 607–871DecDecember: 5 kWp 754 kWh, range 608–901

kWh per month

A typical day in January

The sunniest month in Oamaru. Output peaks around 11:00 solar time, at about 3.1 kWh in the best hour.

0:006:0012:0018:0023:00 3.1 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 621 759 897
February 550 692 834
March 535 644 752
April 405 528 651
May 353 437 521
June 247 324 400
July 302 388 473
August 401 496 591
September 498 631 763
October 563 708 853
November 607 739 871
December 608 754 901
Year 5,882 7,053 8,224

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 Oamaru?

From May to August the system produces about 1,644 kWh, which is 23% of the year. The weakest month (June) gives roughly 324 kWh.

Is an east-west roof worth it in Oamaru?

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 Oamaru

Ground mount or roof in Oamaru?

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 Oamaru

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