How much will solar panels produce in Saint-Étienne?

A 6 kWp system facing south at 35° tilt in Saint-Étienne produces about 7,631 kWh a year. In a weak year that is 6,352 kWh, in a good one 8,910 kWh — 1,272 kWh per kWp.

That’s about 162% of a typical home’s yearly use (4,700 kWh).

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Based on 2014–2023 satellite weather data

Production by month

05001,0001,500JanJanuary: 6 kWp 308 kWh, range 227–389FebFebruary: 6 kWp 475 kWh, range 338–612MarMarch: 6 kWp 676 kWh, range 529–823AprApril: 6 kWp 754 kWh, range 615–894MayMay: 6 kWp 776 kWh, range 614–937JunJune: 6 kWp 867 kWh, range 716–1,019JulJuly: 6 kWp 977 kWh, range 764–1,190AugAugust: 6 kWp 880 kWh, range 726–1,033SepSeptember: 6 kWp 745 kWh, range 601–888OctOctober: 6 kWp 590 kWh, range 463–718NovNovember: 6 kWp 353 kWh, range 247–459DecDecember: 6 kWp 301 kWh, range 151–451

kWh per month

A typical day in July

The sunniest month in Saint-Étienne. Output peaks around 11:00 solar time, at about 3.5 kWh in the best hour.

0:006:0012:0018:0023:00 3.5 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 227 308 389
February 338 475 612
March 529 676 823
April 615 754 894
May 614 776 937
June 716 867 1,019
July 764 977 1,190
August 726 880 1,033
September 601 745 888
October 463 590 718
November 247 353 459
December 151 301 451
Year 6,352 7,631 8,910

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 Saint-Étienne?

From November to February the system produces about 1,436 kWh, which is 19% of the year. The weakest month (December) gives roughly 301 kWh.

Is an east-west roof worth it in Saint-Étienne?

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 Saint-Étienne

Ground mount or roof in Saint-Étienne?

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 Saint-Étienne

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