How much will solar panels produce in Coimbra?

A 5 kWp system facing south at 35° tilt in Coimbra produces about 7,426 kWh a year. In a weak year that is 6,175 kWh, in a good one 8,677 kWh — 1,485 kWh per kWp.

That’s about 248% of a typical home’s yearly use (3,000 kWh).

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Based on 2014–2023 satellite weather data

Production by month

02505007501,000JanJanuary: 5 kWp 463 kWh, range 338–589FebFebruary: 5 kWp 490 kWh, range 362–619MarMarch: 5 kWp 606 kWh, range 466–745AprApril: 5 kWp 634 kWh, range 491–776MayMay: 5 kWp 761 kWh, range 613–909JunJune: 5 kWp 724 kWh, range 593–855JulJuly: 5 kWp 827 kWh, range 676–977AugAugust: 5 kWp 849 kWh, range 706–991SepSeptember: 5 kWp 694 kWh, range 552–836OctOctober: 5 kWp 562 kWh, range 448–676NovNovember: 5 kWp 387 kWh, range 260–513DecDecember: 5 kWp 414 kWh, range 322–505

kWh per month

A typical day in August

The sunniest month in Coimbra. 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 338 463 589
February 362 490 619
March 466 606 745
April 491 634 776
May 613 761 909
June 593 724 855
July 676 827 977
August 706 849 991
September 552 694 836
October 448 562 676
November 260 387 513
December 322 414 505
Year 6,175 7,426 8,677

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 Coimbra?

From November to February the system produces about 1,754 kWh, which is 24% of the year. The weakest month (November) gives roughly 387 kWh.

Is an east-west roof worth it in Coimbra?

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 Coimbra

Ground mount or roof in Coimbra?

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 Coimbra

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