How much will solar panels produce in București?

A 5 kWp system facing south at 35° tilt in București produces about 6,651 kWh a year. In a weak year that is 5,543 kWh, in a good one 7,759 kWh — 1,330 kWh per kWp.

That’s about 333% of a typical home’s yearly use (2,000 kWh).

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Based on 2014–2023 satellite weather data

Production by month

02505007501,000JanJanuary: 5 kWp 246 kWh, range 129–364FebFebruary: 5 kWp 376 kWh, range 294–458MarMarch: 5 kWp 559 kWh, range 448–671AprApril: 5 kWp 639 kWh, range 478–800MayMay: 5 kWp 695 kWh, range 567–823JunJune: 5 kWp 711 kWh, range 582–840JulJuly: 5 kWp 818 kWh, range 680–956AugAugust: 5 kWp 806 kWh, range 670–942SepSeptember: 5 kWp 678 kWh, range 560–796OctOctober: 5 kWp 499 kWh, range 373–626NovNovember: 5 kWp 298 kWh, range 208–389DecDecember: 5 kWp 267 kWh, range 161–372

kWh per month

A typical day in July

The sunniest month in București. Output peaks around 11:00 solar time, at about 3.0 kWh in the best hour.

0:006:0012:0018:0023:00 3.0 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 129 246 364
February 294 376 458
March 448 559 671
April 478 639 800
May 567 695 823
June 582 711 840
July 680 818 956
August 670 806 942
September 560 678 796
October 373 499 626
November 208 298 389
December 161 267 372
Year 5,543 6,651 7,759

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 București?

From November to February the system produces about 1,187 kWh, which is 18% of the year. The weakest month (January) gives roughly 246 kWh.

Is an east-west roof worth it in București?

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 București

Ground mount or roof in București?

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 București

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