How much will solar panels produce in Hoorn?

A 4 kWp system facing south at 35° tilt in Hoorn produces about 4,386 kWh a year. In a weak year that is 3,643 kWh, in a good one 5,129 kWh — 1,097 kWh per kWp.

That’s about 157% of a typical home’s yearly use (2,800 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

0200400600800JanJanuary: 4 kWp 125 kWh, range 94–156FebFebruary: 4 kWp 214 kWh, range 144–284MarMarch: 4 kWp 364 kWh, range 279–449AprApril: 4 kWp 497 kWh, range 393–602MayMay: 4 kWp 574 kWh, range 449–699JunJune: 4 kWp 560 kWh, range 457–664JulJuly: 4 kWp 540 kWh, range 443–637AugAugust: 4 kWp 513 kWh, range 421–604SepSeptember: 4 kWp 411 kWh, range 330–492OctOctober: 4 kWp 251 kWh, range 199–304NovNovember: 4 kWp 160 kWh, range 128–193DecDecember: 4 kWp 101 kWh, range 72–130

kWh per month

A typical day in May

The sunniest month in Hoorn. 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 94 125 156
February 144 214 284
March 279 364 449
April 393 497 602
May 449 574 699
June 457 560 664
July 443 540 637
August 421 513 604
September 330 411 492
October 199 251 304
November 128 160 193
December 72 101 130
Year 3,643 4,386 5,129

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 Hoorn?

From November to February the system produces about 600 kWh, which is 14% of the year. The weakest month (December) gives roughly 101 kWh.

Is an east-west roof worth it in Hoorn?

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 Hoorn

Ground mount or roof in Hoorn?

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 Hoorn

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