Clockwise from top left: Svartån, Västerås Castle, Skrapan, Biskopsgården, Västerås city hall.

Sweden · 10 kWp reference system

Västerås solar forecast

Photo: Listz3, CC BY-SA 4.0. Cropped, resized and converted to WebP by GridPassport.

Wednesday, August 5, 2026

About 7.5 kWh tomorrow

For a standard 10 kWp south-facing system in Västerås, GridPassport estimates 7.5 kWh on Wednesday, August 5, 2026, with a likely range of 4.7-10.2 kWh. The strongest production window is expected at 09:00-13:00 local time.

Updated Aug 4, 2026, 08:53 PM GMT+2 · fresh snapshot
Likely range
4.7-10.2 kWh
Strongest window
09:00-13:00
Confidence
medium
Forecast my solar output

Typical year

Solar production month by month in Västerås

A standard 10 kWp system produces about 9,757 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 Västerås's solar profile different? The typical annual yield is about 976 kWh per installed kWp, ranking Västerås #3 of 7 modelled locations in Sweden. That is 2% above the median of the 7 Sweden locations in this dataset. June is typically the strongest month and December the weakest; the stronger month produces about 15.0 times as much.

See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuary Monthly output150 kWh Daily average4.8 kWh/day Year-to-year variation±40 kWh
MonthFebruary Monthly output374 kWh Daily average13.4 kWh/day Year-to-year variation±101 kWh
MonthMarch Monthly output903 kWh Daily average29.1 kWh/day Year-to-year variation±197 kWh
MonthApril Monthly output1,231 kWh Daily average41.0 kWh/day Year-to-year variation±127 kWh
MonthMay Monthly output1,374 kWh Daily average44.3 kWh/day Year-to-year variation±173 kWh
MonthJune Monthly output1,424 kWh Daily average47.5 kWh/day Year-to-year variation±117 kWh
MonthJuly Monthly output1,386 kWh Daily average44.7 kWh/day Year-to-year variation±119 kWh
MonthAugust Monthly output1,181 kWh Daily average38.1 kWh/day Year-to-year variation±152 kWh
MonthSeptember Monthly output888 kWh Daily average29.6 kWh/day Year-to-year variation±112 kWh
MonthOctober Monthly output547 kWh Daily average17.6 kWh/day Year-to-year variation±112 kWh
MonthNovember Monthly output204 kWh Daily average6.8 kWh/day Year-to-year variation±60 kWh
MonthDecember Monthly output95 kWh Daily average3.1 kWh/day Year-to-year variation±33 kWh

Nearby solar forecasts

Compare Västerås with nearby cities

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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.