How much will solar panels produce in Alkmaar?

A 4 kWp system facing south at 35° tilt in Alkmaar produces about 4,341 kWh a year. In a weak year that is 3,608 kWh, in a good one 5,074 kWh — 1,085 kWh per kWp.

That’s about 155% of a typical home’s yearly use (2,800 kWh).

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Based on 2014–2023 satellite weather data

Production by month

0200400600800JanJanuary: 4 kWp 123 kWh, range 94–152FebFebruary: 4 kWp 212 kWh, range 146–278MarMarch: 4 kWp 373 kWh, range 285–460AprApril: 4 kWp 499 kWh, range 399–600MayMay: 4 kWp 577 kWh, range 455–698JunJune: 4 kWp 558 kWh, range 460–655JulJuly: 4 kWp 559 kWh, range 459–658AugAugust: 4 kWp 512 kWh, range 420–604SepSeptember: 4 kWp 404 kWh, range 329–478OctOctober: 4 kWp 249 kWh, range 194–304NovNovember: 4 kWp 156 kWh, range 122–190DecDecember: 4 kWp 103 kWh, range 70–137

kWh per month

A typical day in May

The sunniest month in Alkmaar. 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 94 123 152
February 146 212 278
March 285 373 460
April 399 499 600
May 455 577 698
June 460 558 655
July 459 559 658
August 420 512 604
September 329 404 478
October 194 249 304
November 122 156 190
December 70 103 137
Year 3,608 4,341 5,074

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 Alkmaar?

From November to February the system produces about 594 kWh, which is 14% of the year. The weakest month (December) gives roughly 103 kWh.

Is an east-west roof worth it in Alkmaar?

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 Alkmaar

Ground mount or roof in Alkmaar?

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 Alkmaar

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