How much will solar panels produce in Leiria?

A 5 kWp system facing south at 35° tilt in Leiria produces about 7,555 kWh a year. In a weak year that is 6,303 kWh, in a good one 8,807 kWh — 1,511 kWh per kWp.

That’s about 252% 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 453 kWh, range 342–564FebFebruary: 5 kWp 497 kWh, range 375–620MarMarch: 5 kWp 613 kWh, range 475–751AprApril: 5 kWp 642 kWh, range 499–784MayMay: 5 kWp 779 kWh, range 633–924JunJune: 5 kWp 732 kWh, range 606–858JulJuly: 5 kWp 812 kWh, range 652–971AugAugust: 5 kWp 841 kWh, range 701–980SepSeptember: 5 kWp 707 kWh, range 569–845OctOctober: 5 kWp 580 kWh, range 461–698NovNovember: 5 kWp 413 kWh, range 287–539DecDecember: 5 kWp 417 kWh, range 322–512

kWh per month

A typical day in August

The sunniest month in Leiria. Output peaks around 11:00 solar time, at about 3.1 kWh in the best hour.

0:006:0012:0018:0023:00 3.1 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 342 453 564
February 375 497 620
March 475 613 751
April 499 642 784
May 633 779 924
June 606 732 858
July 652 812 971
August 701 841 980
September 569 707 845
October 461 580 698
November 287 413 539
December 322 417 512
Year 6,303 7,555 8,807

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 Leiria?

From November to February the system produces about 1,781 kWh, which is 24% of the year. The weakest month (November) gives roughly 413 kWh.

Is an east-west roof worth it in Leiria?

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 Leiria

Ground mount or roof in Leiria?

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 Leiria

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