Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Tuesday, September 1, 2026: 49.8 kWh from the 10 kWp reference system, with a likely range of 37.7 kWh–55.9 kWh. It changes with the next weather forecast.
Spain · 10 kWp reference system
Barcelona solar forecast and PV yield
Photo: M McBey,CC BY 2.0. Cropped, resized and converted to WebP by GridPassport.
Forecast target: . Any “tomorrow” label on this page refers to this dated target.
- Tomorrow's forecast
- 49.8 kWh 10 kWp reference system
- Typical annual output
- 15,696 kWh 10 kWp reference system
- Typical specific yield
- 1,570 kWh/kWp Per year
Tuesday, September 1, 2026
About 49.8 kWh tomorrow
For a standard 10 kWp south-facing system in Barcelona, GridPassport estimates 49.8 kWh on Tuesday, September 1, 2026, with a likely range of 37.7-55.9 kWh. The strongest production window is expected at 10:00-14:00 local time.
Updated Aug 31, 2026, 01:01 AM GMT+2 · fresh snapshot- Likely range
- 37.7-55.9 kWh
- Strongest window
- 10:00-14:00
- Confidence
- medium
How to read and use the data
Barcelona solar forecast: daily weather versus long-term PV yield
The daily and annual figures answer different questions. Use the dated forecast to plan tomorrow, and the PVGIS specific yield to compare locations or estimate a typical year.
Multi-year climate baseline
PVGIS specific yield
Barcelona's PVGIS specific yield is about 1,570 kWh/kWp per year. It is a multi-year climate benchmark, not a prediction for tomorrow or for this calendar year. In the PVGIS profile, July is typically the strongest month and November the weakest.
3, 5 and 10 kWp reference systems
Scale the same assumptions to your system size
SystemTomorrow estimate (likely range)PVGIS typical year
3 kWpTomorrow estimate (likely range)14.9 kWh11.3 kWh–16.8 kWhPVGIS typical year4,709 kWh/year
5 kWpTomorrow estimate (likely range)24.9 kWh18.9 kWh–27.9 kWhPVGIS typical year7,848 kWh/year
10 kWpTomorrow estimate (likely range)49.8 kWh37.7 kWh–55.9 kWhPVGIS typical year15,696 kWh/year
Linear reference scaling only: south-facing, 35° tilt and 14% system losses. It does not resize inverter clipping, shade or local roof constraints.
From forecast to a household plan
Battery, EV, heat pump and flexible loads
Treat the forecast as a gross solar-energy budget before household base load and conversion losses. The numbers support scheduling; they do not guarantee surplus.
Battery
Keep room for the solar window
Use 10:00-14:00 as the first candidate charging window. Battery state of charge, reserve settings and inverter limits still decide how much can be stored.
EV
Compare the charge with the 5 kWp budget
The scaled 5 kWp estimate is 24.9 kWh before household use. Compare the remainder after base load with the planned EV charge and stagger charging if needed.
Heat pump
Shift only flexible thermal demand
If comfort controls allow it, place discretionary hot-water heating or pre-heating inside 10:00-14:00. Never override frost protection, hygiene cycles or manufacturer limits.
Large loads
Avoid stacking appliances
A 3 kWp system scales to about 14.9 kWh for the day before household use. Run flexible loads sequentially during the strongest hours rather than assuming all forecast energy is simultaneous power.
Local questions
Solar forecast FAQ
How much could a 5 kWp solar system produce tomorrow in Barcelona?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 24.9 kWh for Tuesday, September 1, 2026, with a scaled likely range of 18.9 kWh–27.9 kWh. This is a linear reference-system estimate, not a site survey.
What does 1,570 kWh/kWp mean for Barcelona?
It means the PVGIS multi-year profile produces about 1,570 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 7,848 kWh in a typical year before site-specific adjustments.
Is the Barcelona forecast the same as the PVGIS annual estimate?
No. Tomorrow's forecast uses dated weather and an uncertainty band for one day. The PVGIS figure is a multi-year climate-based specific yield used for typical monthly and annual comparisons.
When should a battery, EV or heat pump use solar in Barcelona?
Start with 10:00-14:00, then check household base load, battery headroom, EV energy required and heat-pump safety or comfort constraints. The forecast estimates daily energy, not guaranteed instantaneous surplus.
Typical year
Solar production month by month in Barcelona
A standard 10 kWp system produces about 15,696 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
1061Jan
1082Feb
1378Mar
1420Apr
1573May
1579Jun
1637Jul
1554Aug
1323Sep
1147Oct
966Nov
977Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Barcelona's solar profile different?The typical annual yield is about 1,570 kWh per installed kWp, ranking Barcelona #8 of 10 modelled locations in Spain. That is 3% below the median of the 10 Spain locations in this dataset. July is typically the strongest month and November the weakest; the stronger month produces about 1.7 times as much.
See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuaryMonthly output1,061 kWhDaily average34.2 kWh/dayYear-to-year variation±133 kWh
MonthFebruaryMonthly output1,082 kWhDaily average38.6 kWh/dayYear-to-year variation±121 kWh
MonthMarchMonthly output1,378 kWhDaily average44.5 kWh/dayYear-to-year variation±167 kWh
MonthAprilMonthly output1,420 kWhDaily average47.3 kWh/dayYear-to-year variation±140 kWh
MonthMayMonthly output1,573 kWhDaily average50.7 kWh/dayYear-to-year variation±111 kWh
MonthJuneMonthly output1,579 kWhDaily average52.6 kWh/dayYear-to-year variation±62 kWh
MonthJulyMonthly output1,637 kWhDaily average52.8 kWh/dayYear-to-year variation±63 kWh
MonthAugustMonthly output1,554 kWhDaily average50.1 kWh/dayYear-to-year variation±63 kWh
MonthSeptemberMonthly output1,323 kWhDaily average44.1 kWh/dayYear-to-year variation±76 kWh
MonthOctoberMonthly output1,147 kWhDaily average37.0 kWh/dayYear-to-year variation±133 kWh
MonthNovemberMonthly output966 kWhDaily average32.2 kWh/dayYear-to-year variation±122 kWh
MonthDecemberMonthly output977 kWhDaily average31.5 kWh/dayYear-to-year variation±95 kWh
Nearby solar forecasts
Compare Barcelona with nearby cities
Tomorrow, in one email
Get Barcelona's solar forecast by email
Tomorrow's expected production, likely range and strongest hours. One useful email each day.
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.
CSV and JSON snapshots are published under CC BY 4.0 with source attribution.