How much will solar panels produce in Auckland?

A 5 kWp system facing north at 35° tilt in Auckland produces about 7,377 kWh a year. In a weak year that is 6,158 kWh, in a good one 8,596 kWh — 1,475 kWh per kWp.

That’s about 105% 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 798 kWh, range 649–947FebFebruary: 5 kWp 642 kWh, range 498–786MarMarch: 5 kWp 700 kWh, range 578–821AprApril: 5 kWp 576 kWh, range 474–679MayMay: 5 kWp 508 kWh, range 420–595JunJune: 5 kWp 412 kWh, range 333–492JulJuly: 5 kWp 478 kWh, range 394–561AugAugust: 5 kWp 547 kWh, range 457–637SepSeptember: 5 kWp 626 kWh, range 512–741OctOctober: 5 kWp 691 kWh, range 570–812NovNovember: 5 kWp 709 kWh, range 585–833DecDecember: 5 kWp 740 kWh, range 596–884

kWh per month

A typical day in January

The sunniest month in Auckland. Output peaks around 12:00 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 649 798 947
February 498 642 786
March 578 700 821
April 474 576 679
May 420 508 595
June 333 412 492
July 394 478 561
August 457 547 637
September 512 626 741
October 570 691 812
November 585 709 833
December 596 740 884
Year 6,158 7,377 8,596

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 Auckland?

From May to August the system produces about 1,944 kWh, which is 26% of the year. The weakest month (June) gives roughly 412 kWh.

Is an east-west roof worth it in Auckland?

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 Auckland

Ground mount or roof in Auckland?

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 Auckland

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 New Zealand

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