How much will solar panels produce in Austin?

A 8 kWp system facing south at 35° tilt in Austin produces about 11,930 kWh a year. In a weak year that is 9,938 kWh, in a good one 13,922 kWh — 1,491 kWh per kWp.

That’s about 114% of a typical home’s yearly use (10,500 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

05001,0001,500JanJanuary: 8 kWp 962 kWh, range 766–1,157FebFebruary: 8 kWp 821 kWh, range 552–1,090MarMarch: 8 kWp 1,021 kWh, range 787–1,255AprApril: 8 kWp 1,002 kWh, range 807–1,198MayMay: 8 kWp 978 kWh, range 764–1,191JunJune: 8 kWp 1,020 kWh, range 817–1,224JulJuly: 8 kWp 1,165 kWh, range 970–1,360AugAugust: 8 kWp 1,189 kWh, range 958–1,419SepSeptember: 8 kWp 1,139 kWh, range 902–1,376OctOctober: 8 kWp 1,111 kWh, range 906–1,316NovNovember: 8 kWp 830 kWh, range 624–1,036DecDecember: 8 kWp 792 kWh, range 526–1,057

kWh per month

A typical day in August

The sunniest month in Austin. Output peaks around 10:00 solar time, at about 4.6 kWh in the best hour.

0:006:0012:0018:0023:00 4.6 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 766 962 1,157
February 552 821 1,090
March 787 1,021 1,255
April 807 1,002 1,198
May 764 978 1,191
June 817 1,020 1,224
July 970 1,165 1,360
August 958 1,189 1,419
September 902 1,139 1,376
October 906 1,111 1,316
November 624 830 1,036
December 526 792 1,057
Year 9,938 11,930 13,922

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 Austin?

From November to February the system produces about 3,404 kWh, which is 28% of the year. The weakest month (December) gives roughly 792 kWh.

Is an east-west roof worth it in Austin?

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 Austin

Ground mount or roof in Austin?

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 Austin

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