Join waitlist Waitlist
Open navigation
Join waitlist The PassportCompatibilityWhy we build itManifesto
Tools Solar Forecast Electricity Prices
Russian church

Bulgaria · 10 kWp reference system

Sofia solar forecast

Photo: Deensel, CC BY 2.0. Cropped, resized and converted to WebP by GridPassport.

Wednesday, August 5, 2026

About 53.8 kWh tomorrow

For a standard 10 kWp south-facing system in Sofia, GridPassport estimates 53.8 kWh on Wednesday, August 5, 2026, with a likely range of 44.1-58.5 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
44.1-58.5 kWh
Strongest window
11:00-15:00
Confidence
high
Forecast my solar output

Typical year

Solar production month by month in Sofia

A standard 10 kWp system produces about 13,111 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 Sofia's solar profile different? The typical annual yield is about 1,311 kWh per installed kWp, ranking Sofia #4 of 5 modelled locations in Bulgaria. That is 2% below the median of the 5 Bulgaria locations in this dataset. July is typically the strongest month and December the weakest; the stronger month produces about 2.4 times as much.

See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuary Monthly output713 kWh Daily average23.0 kWh/day Year-to-year variation±119 kWh
MonthFebruary Monthly output858 kWh Daily average30.6 kWh/day Year-to-year variation±117 kWh
MonthMarch Monthly output1,106 kWh Daily average35.7 kWh/day Year-to-year variation±141 kWh
MonthApril Monthly output1,208 kWh Daily average40.3 kWh/day Year-to-year variation±147 kWh
MonthMay Monthly output1,260 kWh Daily average40.6 kWh/day Year-to-year variation±145 kWh
MonthJune Monthly output1,308 kWh Daily average43.6 kWh/day Year-to-year variation±117 kWh
MonthJuly Monthly output1,491 kWh Daily average48.1 kWh/day Year-to-year variation±121 kWh
MonthAugust Monthly output1,488 kWh Daily average48.0 kWh/day Year-to-year variation±118 kWh
MonthSeptember Monthly output1,225 kWh Daily average40.8 kWh/day Year-to-year variation±119 kWh
MonthOctober Monthly output1,077 kWh Daily average34.7 kWh/day Year-to-year variation±191 kWh
MonthNovember Monthly output763 kWh Daily average25.4 kWh/day Year-to-year variation±140 kWh
MonthDecember Monthly output616 kWh Daily average19.9 kWh/day Year-to-year variation±129 kWh

Nearby solar forecasts

Compare Sofia with nearby cities

PlovdivBulgaria 46.7 kWh NisSerbia 52.2 kWh KumanovoNorth Macedonia 52.9 kWh

Tomorrow, in one email

Get Sofia's solar forecast by email

Tomorrow's expected production, likely range and strongest hours. One useful email each day.

Daily email only. We save your setup and basic signup/device details. Unsubscribe in one click. Privacy

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.

Change the system assumptions Read the methodology Download CSV Download JSON Image credits