Across 4 modelled locations in Slovenia, a standard 10 kWp south-facing system produces about 12,317 kWh in a typical year on average. Tomorrow's weather-based city forecasts range from 53.2 to 54.3 kWh for the same reference setup.

Forecast for Wednesday, August 5, 2026 · Updated Aug 4, 2026, 06:53 PM UTC · City samples, not a national production forecast

Tomorrow in Slovenia

One system. Different local weather.

Using the same installation in every location isolates the effect of weather and geography. Enter your own roof on any city page for a personal estimate.

City average

53.8 kWh

Lowest city estimate

53.2 kWh

Highest city estimate

54.3 kWh

Representative locations

Solar forecasts for major cities in Slovenia

Koper53.4 kWh tomorrow Ljubljana53.2 kWh tomorrow Maribor54.1 kWh tomorrow

Typical year

Monthly solar production across Slovenia

The bars average the 4 city reference points. Typical annual output ranges from about 11,708 to 13,360 kWh for the 10 kWp setup. Of the locations modelled, Koper has the highest typical annual output and Ljubljana the lowest.

619 Jan

759 Feb

1108 Mar

1235 Apr

1298 May

1371 Jun

1454 Jul

1365 Aug

1135 Sep

903 Oct

558 Nov

513 Dec

January619 kWh

February759 kWh

March1,108 kWh

April1,235 kWh

May1,298 kWh

June1,371 kWh

July1,454 kWh

August1,365 kWh

September1,135 kWh

October903 kWh

November558 kWh

December513 kWh

Typical monthly profiles use the European Commission JRC PVGIS multi-year climate series.

Local profiles

All 4 Slovenia city forecasts

Celje11,823 kWh typical year 54.3 kWh tomorrow Koper13,360 kWh typical year 53.4 kWh tomorrow Ljubljana11,708 kWh typical year 53.2 kWh tomorrow Maribor12,377 kWh typical year 54.1 kWh tomorrow

Use the data

Download the country snapshot or inspect the assumptions, sources, uncertainty ranges and refresh rules.

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