How much will solar panels produce in Napoli?

A 6 kWp system facing south at 35° tilt in Napoli produces about 9,078 kWh a year. In a weak year that is 7,601 kWh, in a good one 10,556 kWh — 1,513 kWh per kWp.

That’s about 336% of a typical home’s yearly use (2,700 kWh).

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Based on 2014–2023 satellite weather data

Production by month

05001,0001,500JanJanuary: 6 kWp 475 kWh, range 373–578FebFebruary: 6 kWp 584 kWh, range 463–705MarMarch: 6 kWp 792 kWh, range 644–940AprApril: 6 kWp 855 kWh, range 706–1,004MayMay: 6 kWp 932 kWh, range 762–1,103JunJune: 6 kWp 978 kWh, range 820–1,137JulJuly: 6 kWp 1,056 kWh, range 885–1,227AugAugust: 6 kWp 1,017 kWh, range 851–1,183SepSeptember: 6 kWp 855 kWh, range 713–997OctOctober: 6 kWp 734 kWh, range 571–898NovNovember: 6 kWp 526 kWh, range 411–640DecDecember: 6 kWp 443 kWh, range 330–556

kWh per month

A typical day in July

The sunniest month in Napoli. Output peaks around 11:00 solar time, at about 4.2 kWh in the best hour.

0:006:0012:0018:0023:00 4.2 0

Month by month

Month Weak year, kWh Typical year, kWh Good year, kWh
January 373 475 578
February 463 584 705
March 644 792 940
April 706 855 1,004
May 762 932 1,103
June 820 978 1,137
July 885 1,056 1,227
August 851 1,017 1,183
September 713 855 997
October 571 734 898
November 411 526 640
December 330 443 556
Year 7,601 9,078 10,556

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 Napoli?

From November to February the system produces about 2,028 kWh, which is 22% of the year. The weakest month (December) gives roughly 443 kWh.

Is an east-west roof worth it in Napoli?

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 Napoli

Ground mount or roof in Napoli?

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 Napoli

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