How much will solar panels produce in Ostrava?

A 6 kWp system facing south at 35° tilt in Ostrava produces about 6,536 kWh a year. In a weak year that is 5,460 kWh, in a good one 7,612 kWh — 1,089 kWh per kWp.

That’s about 218% of a typical home’s yearly use (3,000 kWh).

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Based on 2014–2023 satellite weather data

Production by month

05001,0001,500JanJanuary: 6 kWp 207 kWh, range 134–281FebFebruary: 6 kWp 317 kWh, range 215–420MarMarch: 6 kWp 547 kWh, range 425–669AprApril: 6 kWp 645 kWh, range 482–808MayMay: 6 kWp 727 kWh, range 572–881JunJune: 6 kWp 836 kWh, range 651–1,022JulJuly: 6 kWp 826 kWh, range 688–964AugAugust: 6 kWp 802 kWh, range 650–955SepSeptember: 6 kWp 629 kWh, range 493–765OctOctober: 6 kWp 452 kWh, range 307–598NovNovember: 6 kWp 265 kWh, range 200–329DecDecember: 6 kWp 171 kWh, range 104–238

kWh per month

A typical day in June

The sunniest month in Ostrava. Output peaks around 11:00 solar time, at about 3.4 kWh in the best hour.

0:006:0012:0018:0023:00 3.4 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 134 207 281
February 215 317 420
March 425 547 669
April 482 645 808
May 572 727 881
June 651 836 1,022
July 688 826 964
August 650 802 955
September 493 629 765
October 307 452 598
November 200 265 329
December 104 171 238
Year 5,460 6,536 7,612

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 Ostrava?

From November to February the system produces about 960 kWh, which is 15% of the year. The weakest month (December) gives roughly 171 kWh.

Is an east-west roof worth it in Ostrava?

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 Ostrava

Ground mount or roof in Ostrava?

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 Ostrava

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