How much will solar panels produce in Toowoomba?

A 6.6 kWp system facing north at 35° tilt in Toowoomba produces about 10,821 kWh a year. In a weak year that is 9,005 kWh, in a good one 12,637 kWh — 1,640 kWh per kWp.

That’s about 197% of a typical home’s yearly use (5,500 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

05001,0001,500JanJanuary: 6.6 kWp 865 kWh, range 699–1,031FebFebruary: 6.6 kWp 836 kWh, range 665–1,008MarMarch: 6.6 kWp 892 kWh, range 732–1,051AprApril: 6.6 kWp 928 kWh, range 773–1,084MayMay: 6.6 kWp 873 kWh, range 684–1,063JunJune: 6.6 kWp 811 kWh, range 654–969JulJuly: 6.6 kWp 874 kWh, range 698–1,049AugAugust: 6.6 kWp 979 kWh, range 770–1,187SepSeptember: 6.6 kWp 986 kWh, range 763–1,209OctOctober: 6.6 kWp 987 kWh, range 750–1,225NovNovember: 6.6 kWp 944 kWh, range 736–1,151DecDecember: 6.6 kWp 928 kWh, range 756–1,100

kWh per month

A typical day in October

The sunniest month in Toowoomba. Output peaks around 11:00 solar time, at about 4.0 kWh in the best hour.

0:006:0012:0018:0023:00 4.0 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 699 865 1,031
February 665 836 1,008
March 732 892 1,051
April 773 928 1,084
May 684 873 1,063
June 654 811 969
July 698 874 1,049
August 770 979 1,187
September 763 986 1,209
October 750 987 1,225
November 736 944 1,151
December 756 928 1,100
Year 9,005 10,821 12,637

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 Toowoomba?

From May to August the system produces about 3,537 kWh, which is 32% of the year. The weakest month (June) gives roughly 811 kWh.

Is an east-west roof worth it in Toowoomba?

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 Toowoomba

Ground mount or roof in Toowoomba?

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 Toowoomba

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