How much will solar panels produce in Liberec?

A 6 kWp system facing south at 35° tilt in Liberec produces about 6,158 kWh a year. In a weak year that is 5,095 kWh, in a good one 7,222 kWh — 1,026 kWh per kWp.

That’s about 205% of a typical home’s yearly use (3,000 kWh).

Calculate for my roof

Based on 2014–2023 satellite weather data

Production by month

05001,0001,500JanJanuary: 6 kWp 144 kWh, range 105–184FebFebruary: 6 kWp 320 kWh, range 231–410MarMarch: 6 kWp 522 kWh, range 391–653AprApril: 6 kWp 630 kWh, range 467–792MayMay: 6 kWp 819 kWh, range 635–1,004JunJune: 6 kWp 801 kWh, range 635–967JulJuly: 6 kWp 835 kWh, range 692–978AugAugust: 6 kWp 760 kWh, range 620–901SepSeptember: 6 kWp 631 kWh, range 484–778OctOctober: 6 kWp 376 kWh, range 257–495NovNovember: 6 kWp 174 kWh, range 119–229DecDecember: 6 kWp 121 kWh, range 88–155

kWh per month

A typical day in July

The sunniest month in Liberec. Output peaks around 11:00 solar time, at about 3.3 kWh in the best hour.

0:006:0012:0018:0023:00 3.3 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 105 144 184
February 231 320 410
March 391 522 653
April 467 630 792
May 635 819 1,004
June 635 801 967
July 692 835 978
August 620 760 901
September 484 631 778
October 257 376 495
November 119 174 229
December 88 121 155
Year 5,095 6,158 7,222

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 Liberec?

From November to February the system produces about 760 kWh, which is 12% of the year. The weakest month (December) gives roughly 121 kWh.

Is an east-west roof worth it in Liberec?

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 Liberec

Ground mount or roof in Liberec?

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 Liberec

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

All cities in Czechia

Climate data: Photovoltaic Geographical Information System (PVGIS) — European Commission, Joint Research Centre