How much will solar panels produce in Winterthur?

A 8 kWp system facing south at 35° tilt in Winterthur produces about 9,117 kWh a year. In a weak year that is 7,590 kWh, in a good one 10,643 kWh — 1,140 kWh per kWp.

That’s about 203% of a typical home’s yearly use (4,500 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

05001,0001,500JanJanuary: 8 kWp 317 kWh, range 210–424FebFebruary: 8 kWp 496 kWh, range 352–640MarMarch: 8 kWp 858 kWh, range 654–1,062AprApril: 8 kWp 985 kWh, range 766–1,204MayMay: 8 kWp 1,009 kWh, range 813–1,204JunJune: 8 kWp 1,161 kWh, range 922–1,400JulJuly: 8 kWp 1,180 kWh, range 932–1,429AugAugust: 8 kWp 1,060 kWh, range 860–1,261SepSeptember: 8 kWp 929 kWh, range 734–1,125OctOctober: 8 kWp 624 kWh, range 476–772NovNovember: 8 kWp 314 kWh, range 242–385DecDecember: 8 kWp 242 kWh, range 138–347

kWh per month

A typical day in July

The sunniest month in Winterthur. Output peaks around 12:00 solar time, at about 4.8 kWh in the best hour.

0:006:0012:0018:0023:00 4.8 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 210 317 424
February 352 496 640
March 654 858 1,062
April 766 985 1,204
May 813 1,009 1,204
June 922 1,161 1,400
July 932 1,180 1,429
August 860 1,060 1,261
September 734 929 1,125
October 476 624 772
November 242 314 385
December 138 242 347
Year 7,590 9,117 10,643

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 Winterthur?

From November to February the system produces about 1,369 kWh, which is 15% of the year. The weakest month (December) gives roughly 242 kWh.

Is an east-west roof worth it in Winterthur?

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 Winterthur

Ground mount or roof in Winterthur?

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 Winterthur

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