How much will solar panels produce in Interlaken?

A 8 kWp system facing south at 35° tilt in Interlaken produces about 6,442 kWh a year. In a weak year that is 5,396 kWh, in a good one 7,489 kWh — 805 kWh per kWp.

That’s about 143% of a typical home’s yearly use (4,500 kWh).

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Based on 2014–2023 satellite weather data

Production by month

05001,0001,500JanJanuary: 8 kWp 151 kWh, range 124–178FebFebruary: 8 kWp 268 kWh, range 220–316MarMarch: 8 kWp 591 kWh, range 472–709AprApril: 8 kWp 754 kWh, range 613–895MayMay: 8 kWp 779 kWh, range 641–918JunJune: 8 kWp 907 kWh, range 723–1,092JulJuly: 8 kWp 896 kWh, range 727–1,066AugAugust: 8 kWp 790 kWh, range 650–930SepSeptember: 8 kWp 656 kWh, range 537–775OctOctober: 8 kWp 418 kWh, range 332–504NovNovember: 8 kWp 148 kWh, range 121–174DecDecember: 8 kWp 110 kWh, range 90–130

kWh per month

A typical day in June

The sunniest month in Interlaken. Output peaks around 11:00 solar time, at about 4.4 kWh in the best hour.

0:006:0012:0018:0023:00 4.4 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 124 151 178
February 220 268 316
March 472 591 709
April 613 754 895
May 641 779 918
June 723 907 1,092
July 727 896 1,066
August 650 790 930
September 537 656 775
October 332 418 504
November 121 148 174
December 90 110 130
Year 5,396 6,442 7,489

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 Interlaken?

From November to February the system produces about 677 kWh, which is 10% of the year. The weakest month (December) gives roughly 110 kWh.

Is an east-west roof worth it in Interlaken?

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 Interlaken

Ground mount or roof in Interlaken?

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 Interlaken

Your roof is not an average roof

Set your own tilt, direction, shading and inverter limit and get a range for your address.

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