How much will solar panels produce in Groningen?

A 4 kWp system facing south at 35° tilt in Groningen produces about 4,056 kWh a year. In a weak year that is 3,361 kWh, in a good one 4,751 kWh — 1,014 kWh per kWp.

That’s about 145% 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 116 kWh, range 92–141FebFebruary: 4 kWp 213 kWh, range 156–270MarMarch: 4 kWp 351 kWh, range 266–435AprApril: 4 kWp 484 kWh, range 382–585MayMay: 4 kWp 520 kWh, range 401–640JunJune: 4 kWp 502 kWh, range 410–594JulJuly: 4 kWp 500 kWh, range 406–594AugAugust: 4 kWp 493 kWh, range 408–578SepSeptember: 4 kWp 389 kWh, range 309–469OctOctober: 4 kWp 240 kWh, range 186–293NovNovember: 4 kWp 138 kWh, range 102–175DecDecember: 4 kWp 97 kWh, range 65–129

kWh per month

A typical day in May

The sunniest month in Groningen. Output peaks around 11:00 solar time, at about 2.0 kWh in the best hour.

0:006:0012:0018:0023:00 2.0 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 92 116 141
February 156 213 270
March 266 351 435
April 382 484 585
May 401 520 640
June 410 502 594
July 406 500 594
August 408 493 578
September 309 389 469
October 186 240 293
November 102 138 175
December 65 97 129
Year 3,361 4,056 4,751

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 Groningen?

From November to February the system produces about 565 kWh, which is 14% of the year. The weakest month (December) gives roughly 97 kWh.

Is an east-west roof worth it in Groningen?

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 Groningen

Ground mount or roof in Groningen?

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 Groningen

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