How much will solar panels produce in Vila Real?

A 5 kWp system facing south at 35° tilt in Vila Real produces about 7,387 kWh a year. In a weak year that is 6,181 kWh, in a good one 8,592 kWh — 1,477 kWh per kWp.

That’s about 246% 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 437 kWh, range 302–573FebFebruary: 5 kWp 465 kWh, range 316–614MarMarch: 5 kWp 619 kWh, range 458–779AprApril: 5 kWp 652 kWh, range 501–802MayMay: 5 kWp 779 kWh, range 643–916JunJune: 5 kWp 763 kWh, range 629–897JulJuly: 5 kWp 886 kWh, range 739–1,032AugAugust: 5 kWp 881 kWh, range 736–1,027SepSeptember: 5 kWp 729 kWh, range 582–876OctOctober: 5 kWp 534 kWh, range 407–661NovNovember: 5 kWp 353 kWh, range 219–487DecDecember: 5 kWp 326 kWh, range 256–396

kWh per month

A typical day in July

The sunniest month in Vila Real. Output peaks around 11:00 solar time, at about 3.2 kWh in the best hour.

0:006:0012:0018:0023:00 3.2 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 302 437 573
February 316 465 614
March 458 619 779
April 501 652 802
May 643 779 916
June 629 763 897
July 739 886 1,032
August 736 881 1,027
September 582 729 876
October 407 534 661
November 219 353 487
December 256 326 396
Year 6,181 7,387 8,592

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 Vila Real?

From November to February the system produces about 1,581 kWh, which is 21% of the year. The weakest month (December) gives roughly 326 kWh.

Is an east-west roof worth it in Vila Real?

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 Vila Real

Ground mount or roof in Vila Real?

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 Vila Real

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