Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Tuesday, September 1, 2026: 51.1 kWh from the 10 kWp reference system, with a likely range of 43.5 kWh–54.5 kWh. It changes with the next weather forecast.
Italy · 10 kWp reference system
Palermo solar forecast and PV yield
Photo: Tango7174,CC BY-SA 4.0. Cropped, resized and converted to WebP by GridPassport.
Forecast target: . Any “tomorrow” label on this page refers to this dated target.
- Tomorrow's forecast
- 51.1 kWh 10 kWp reference system
- Typical annual output
- 15,314 kWh 10 kWp reference system
- Typical specific yield
- 1,531 kWh/kWp Per year
Tuesday, September 1, 2026
About 51.1 kWh tomorrow
For a standard 10 kWp south-facing system in Palermo, GridPassport estimates 51.1 kWh on Tuesday, September 1, 2026, with a likely range of 43.5-54.5 kWh. The strongest production window is expected at 12:00-16:00 local time.
Updated Aug 31, 2026, 01:01 AM GMT+2 · fresh snapshot- Likely range
- 43.5-54.5 kWh
- Strongest window
- 12:00-16:00
- Confidence
- high
How to read and use the data
Palermo 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
Palermo's PVGIS specific yield is about 1,531 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 December 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)15.3 kWh13.1 kWh–16.4 kWhPVGIS typical year4,594 kWh/year
5 kWpTomorrow estimate (likely range)25.6 kWh21.8 kWh–27.3 kWhPVGIS typical year7,657 kWh/year
10 kWpTomorrow estimate (likely range)51.1 kWh43.5 kWh–54.5 kWhPVGIS typical year15,314 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 12:00-16:00 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 25.6 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 12:00-16:00. Never override frost protection, hygiene cycles or manufacturer limits.
Large loads
Avoid stacking appliances
A 3 kWp system scales to about 15.3 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 Palermo?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 25.6 kWh for Tuesday, September 1, 2026, with a scaled likely range of 21.8 kWh–27.3 kWh. This is a linear reference-system estimate, not a site survey.
What does 1,531 kWh/kWp mean for Palermo?
It means the PVGIS multi-year profile produces about 1,531 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 7,657 kWh in a typical year before site-specific adjustments.
Is the Palermo 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 Palermo?
Start with 12:00-16:00, 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 Palermo
A standard 10 kWp system produces about 15,314 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
913Jan
992Feb
1308Mar
1395Apr
1527May
1531Jun
1657Jul
1619Aug
1352Sep
1188Oct
969Nov
864Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Palermo's solar profile different?The typical annual yield is about 1,531 kWh per installed kWp, ranking Palermo #3 of 10 modelled locations in Italy. That is 7% above the median of the 10 Italy locations in this dataset. July is typically the strongest month and December the weakest; the stronger month produces about 1.9 times as much.
See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuaryMonthly output913 kWhDaily average29.4 kWh/dayYear-to-year variation±134 kWh
MonthFebruaryMonthly output992 kWhDaily average35.4 kWh/dayYear-to-year variation±191 kWh
MonthMarchMonthly output1,308 kWhDaily average42.2 kWh/dayYear-to-year variation±137 kWh
MonthAprilMonthly output1,395 kWhDaily average46.5 kWh/dayYear-to-year variation±99 kWh
MonthMayMonthly output1,527 kWhDaily average49.2 kWh/dayYear-to-year variation±124 kWh
MonthJuneMonthly output1,531 kWhDaily average51.0 kWh/dayYear-to-year variation±53 kWh
MonthJulyMonthly output1,657 kWhDaily average53.4 kWh/dayYear-to-year variation±33 kWh
MonthAugustMonthly output1,619 kWhDaily average52.2 kWh/dayYear-to-year variation±75 kWh
MonthSeptemberMonthly output1,352 kWhDaily average45.1 kWh/dayYear-to-year variation±76 kWh
MonthOctoberMonthly output1,188 kWhDaily average38.3 kWh/dayYear-to-year variation±133 kWh
MonthNovemberMonthly output969 kWhDaily average32.3 kWh/dayYear-to-year variation±109 kWh
MonthDecemberMonthly output864 kWhDaily average27.9 kWh/dayYear-to-year variation±83 kWh
Nearby solar forecasts
Compare Palermo with nearby cities
Tomorrow, in one email
Get Palermo'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.