How much will solar panels produce in Genève?

A 8 kWp system facing south at 35° tilt in Genève produces about 10,433 kWh a year. In a weak year that is 8,715 kWh, in a good one 12,151 kWh — 1,304 kWh per kWp.

That’s about 232% of a typical home’s yearly use (4,500 kWh).

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Based on 2014–2023 satellite weather data

Production by month

05001,0001,5002,000JanJanuary: 8 kWp 471 kWh, range 334–608FebFebruary: 8 kWp 612 kWh, range 426–798MarMarch: 8 kWp 952 kWh, range 743–1,160AprApril: 8 kWp 1,081 kWh, range 845–1,317MayMay: 8 kWp 1,106 kWh, range 906–1,306JunJune: 8 kWp 1,212 kWh, range 987–1,438JulJuly: 8 kWp 1,279 kWh, range 1,020–1,539AugAugust: 8 kWp 1,183 kWh, range 983–1,384SepSeptember: 8 kWp 1,016 kWh, range 833–1,199OctOctober: 8 kWp 780 kWh, range 596–965NovNovember: 8 kWp 423 kWh, range 329–518DecDecember: 8 kWp 363 kWh, range 279–447

kWh per month

A typical day in July

The sunniest month in Genève. Output peaks around 11:00 solar time, at about 5.1 kWh in the best hour.

0:006:0012:0018:0023:00 5.1 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 334 471 608
February 426 612 798
March 743 952 1,160
April 845 1,081 1,317
May 906 1,106 1,306
June 987 1,212 1,438
July 1,020 1,279 1,539
August 983 1,183 1,384
September 833 1,016 1,199
October 596 780 965
November 329 423 518
December 279 363 447
Year 8,715 10,433 12,151

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 Genève?

From November to February the system produces about 1,870 kWh, which is 18% of the year. The weakest month (December) gives roughly 363 kWh.

Is an east-west roof worth it in Genève?

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 Genève

Ground mount or roof in Genève?

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 Genève

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