How much will solar panels produce in Barcelona?

A 5 kWp system facing south at 35° tilt in Barcelona produces about 8,071 kWh a year. In a weak year that is 6,761 kWh, in a good one 9,382 kWh — 1,614 kWh per kWp.

That’s about 245% of a typical home’s yearly use (3,300 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

02505007501,000JanJanuary: 5 kWp 543 kWh, range 440–647FebFebruary: 5 kWp 552 kWh, range 436–668MarMarch: 5 kWp 718 kWh, range 577–859AprApril: 5 kWp 731 kWh, range 598–865MayMay: 5 kWp 808 kWh, range 673–943JunJune: 5 kWp 813 kWh, range 677–949JulJuly: 5 kWp 851 kWh, range 713–989AugAugust: 5 kWp 817 kWh, range 682–951SepSeptember: 5 kWp 689 kWh, range 568–809OctOctober: 5 kWp 595 kWh, range 479–710NovNovember: 5 kWp 495 kWh, range 385–605DecDecember: 5 kWp 491 kWh, range 401–580

kWh per month

A typical day in July

The sunniest month in Barcelona. 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 440 543 647
February 436 552 668
March 577 718 859
April 598 731 865
May 673 808 943
June 677 813 949
July 713 851 989
August 682 817 951
September 568 689 809
October 479 595 710
November 385 495 605
December 401 491 580
Year 6,761 8,071 9,382

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 Barcelona?

From November to February the system produces about 2,081 kWh, which is 26% of the year. The weakest month (December) gives roughly 491 kWh.

Is an east-west roof worth it in Barcelona?

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 Barcelona

Ground mount or roof in Barcelona?

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 Barcelona

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