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Romania · 10 kWp reference system

Bucharest solar forecast

Photo: Madalin Pentelie, CC0. Cropped, resized and converted to WebP by GridPassport.

Wednesday, August 5, 2026

About 50.4 kWh tomorrow

For a standard 10 kWp south-facing system in Bucharest, GridPassport estimates 50.4 kWh on Wednesday, August 5, 2026, with a likely range of 41.4-57.2 kWh. The strongest production window is expected at 11:00-15:00 local time.

Updated Aug 4, 2026, 09:53 PM GMT+3 · fresh snapshot
Likely range
41.4-57.2 kWh
Strongest window
11:00-15:00
Confidence
high
Forecast my solar output

Typical year

Solar production month by month in Bucharest

A standard 10 kWp system produces about 12,973 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.

Values are kWh per month. Source: European Commission JRC PVGIS.

What makes Bucharest's solar profile different? The typical annual yield is about 1,297 kWh per installed kWp, ranking Bucharest #2 of 6 modelled locations in Romania. That is 5% above the median of the 6 Romania locations in this dataset. July is typically the strongest month and December the weakest; the stronger month produces about 2.9 times as much.

See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuary Monthly output574 kWh Daily average18.5 kWh/day Year-to-year variation±180 kWh
MonthFebruary Monthly output757 kWh Daily average27.0 kWh/day Year-to-year variation±139 kWh
MonthMarch Monthly output1,144 kWh Daily average36.9 kWh/day Year-to-year variation±147 kWh
MonthApril Monthly output1,282 kWh Daily average42.7 kWh/day Year-to-year variation±147 kWh
MonthMay Monthly output1,382 kWh Daily average44.6 kWh/day Year-to-year variation±103 kWh
MonthJune Monthly output1,386 kWh Daily average46.2 kWh/day Year-to-year variation±89 kWh
MonthJuly Monthly output1,512 kWh Daily average48.8 kWh/day Year-to-year variation±102 kWh
MonthAugust Monthly output1,495 kWh Daily average48.2 kWh/day Year-to-year variation±74 kWh
MonthSeptember Monthly output1,258 kWh Daily average41.9 kWh/day Year-to-year variation±110 kWh
MonthOctober Monthly output1,021 kWh Daily average32.9 kWh/day Year-to-year variation±171 kWh
MonthNovember Monthly output633 kWh Daily average21.1 kWh/day Year-to-year variation±115 kWh
MonthDecember Monthly output529 kWh Daily average17.1 kWh/day Year-to-year variation±159 kWh

Nearby solar forecasts

Compare Bucharest with nearby cities

RuseBulgaria 53.6 kWh BrașovRomania 55.5 kWh VarnaBulgaria 54.1 kWh

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Method and data

Every city uses a 10 kWp system facing south at 35 degrees with 14% system losses. Tomorrow's figure combines hourly weather with GridPassport's PV production and uncertainty model. The monthly profile uses the European Commission JRC PVGIS multi-year climate series. Roof direction, shade, snow, dirt, inverter clipping and local weather can change real output.

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