How much will solar panels produce in San Sebastián?

A 5 kWp system facing south at 35° tilt in San Sebastián produces about 5,861 kWh a year. In a weak year that is 4,899 kWh, in a good one 6,823 kWh — 1,172 kWh per kWp.

That’s about 178% of a typical home’s yearly use (3,300 kWh).

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Based on 2014–2023 satellite weather data

Production by month

0200400600800JanJanuary: 5 kWp 274 kWh, range 191–357FebFebruary: 5 kWp 356 kWh, range 245–467MarMarch: 5 kWp 485 kWh, range 365–605AprApril: 5 kWp 549 kWh, range 438–661MayMay: 5 kWp 620 kWh, range 494–746JunJune: 5 kWp 558 kWh, range 457–659JulJuly: 5 kWp 584 kWh, range 464–704AugAugust: 5 kWp 635 kWh, range 528–743SepSeptember: 5 kWp 597 kWh, range 487–708OctOctober: 5 kWp 455 kWh, range 363–546NovNovember: 5 kWp 313 kWh, range 229–397DecDecember: 5 kWp 287 kWh, range 191–383

kWh per month

A typical day in August

The sunniest month in San Sebastián. Output peaks around 11:00 solar time, at about 2.3 kWh in the best hour.

0:006:0012:0018:0023:00 2.3 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 191 274 357
February 245 356 467
March 365 485 605
April 438 549 661
May 494 620 746
June 457 558 659
July 464 584 704
August 528 635 743
September 487 597 708
October 363 455 546
November 229 313 397
December 191 287 383
Year 4,899 5,861 6,823

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 San Sebastián?

From November to February the system produces about 1,230 kWh, which is 22% of the year. The weakest month (January) gives roughly 274 kWh.

Is an east-west roof worth it in San Sebastián?

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 San Sebastián

Ground mount or roof in San Sebastián?

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 San Sebastián

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