How much will solar panels produce in Guimarães?

A 5 kWp system facing south at 35° tilt in Guimarães produces about 7,154 kWh a year. In a weak year that is 5,981 kWh, in a good one 8,326 kWh — 1,431 kWh per kWp.

That’s about 238% of a typical home’s yearly use (3,000 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

02505007501,000JanJanuary: 5 kWp 426 kWh, range 295–556FebFebruary: 5 kWp 445 kWh, range 310–580MarMarch: 5 kWp 584 kWh, range 445–722AprApril: 5 kWp 620 kWh, range 482–757MayMay: 5 kWp 776 kWh, range 637–915JunJune: 5 kWp 718 kWh, range 590–846JulJuly: 5 kWp 822 kWh, range 669–975AugAugust: 5 kWp 821 kWh, range 673–969SepSeptember: 5 kWp 699 kWh, range 558–840OctOctober: 5 kWp 510 kWh, range 373–647NovNovember: 5 kWp 369 kWh, range 230–508DecDecember: 5 kWp 354 kWh, range 247–461

kWh per month

A typical day in July

The sunniest month in Guimarães. Output peaks around 11:00 solar time, at about 3.0 kWh in the best hour.

0:006:0012:0018:0023:00 3.0 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 295 426 556
February 310 445 580
March 445 584 722
April 482 620 757
May 637 776 915
June 590 718 846
July 669 822 975
August 673 821 969
September 558 699 840
October 373 510 647
November 230 369 508
December 247 354 461
Year 5,981 7,154 8,326

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 Guimarães?

From November to February the system produces about 1,594 kWh, which is 22% of the year. The weakest month (December) gives roughly 354 kWh.

Is an east-west roof worth it in Guimarães?

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 Guimarães

Ground mount or roof in Guimarães?

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 Guimarães

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