How much will solar panels produce in Portimão?

A 5 kWp system facing south at 35° tilt in Portimão produces about 8,838 kWh a year. In a weak year that is 7,411 kWh, in a good one 10,265 kWh — 1,768 kWh per kWp.

That’s about 295% of a typical home’s yearly use (3,000 kWh).

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Based on 2014–2023 satellite weather data

Production by month

05001,0001,500JanJanuary: 5 kWp 624 kWh, range 500–749FebFebruary: 5 kWp 580 kWh, range 449–711MarMarch: 5 kWp 772 kWh, range 619–924AprApril: 5 kWp 770 kWh, range 639–901MayMay: 5 kWp 877 kWh, range 731–1,022JunJune: 5 kWp 825 kWh, range 691–959JulJuly: 5 kWp 913 kWh, range 765–1,061AugAugust: 5 kWp 918 kWh, range 770–1,065SepSeptember: 5 kWp 819 kWh, range 681–956OctOctober: 5 kWp 679 kWh, range 548–809NovNovember: 5 kWp 559 kWh, range 456–662DecDecember: 5 kWp 535 kWh, range 428–642

kWh per month

A typical day in August

The sunniest month in Portimão. Output peaks around 11:00 solar time, at about 3.6 kWh in the best hour.

0:006:0012:0018:0023:00 3.6 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 500 624 749
February 449 580 711
March 619 772 924
April 639 770 901
May 731 877 1,022
June 691 825 959
July 765 913 1,061
August 770 918 1,065
September 681 819 956
October 548 679 809
November 456 559 662
December 428 535 642
Year 7,411 8,838 10,265

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 Portimão?

From November to February the system produces about 2,298 kWh, which is 26% of the year. The weakest month (December) gives roughly 535 kWh.

Is an east-west roof worth it in Portimão?

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 Portimão

Ground mount or roof in Portimão?

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 Portimão

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