Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Tuesday, September 1, 2026: 45.5 kWh from the 10 kWp reference system, with a likely range of 37.2 kWh–49.7 kWh. It changes with the next weather forecast.
Greece · 10 kWp reference system
Ioannina solar forecast and PV yield
Photo: SilentResident (compilation, sources to attribute see above; if any of the sources used in the Montage are removed from Wikimedia Commons, or better ones are found, please inform its creator so that they can update it. You can contact the creator by leaving a message here: [1] ),CC BY-SA 3.0. Cropped, resized and converted to WebP by GridPassport.
Forecast target: . Any “tomorrow” label on this page refers to this dated target.
- Tomorrow's forecast
- 45.5 kWh 10 kWp reference system
- Typical annual output
- 14,462 kWh 10 kWp reference system
- Typical specific yield
- 1,446 kWh/kWp Per year
Tuesday, September 1, 2026
About 45.5 kWh tomorrow
For a standard 10 kWp south-facing system in Ioannina, GridPassport estimates 45.5 kWh on Tuesday, September 1, 2026, with a likely range of 37.2-49.7 kWh. The strongest production window is expected at 12:00-16:00 local time.
Updated Aug 31, 2026, 02:01 AM GMT+3 · fresh snapshot- Likely range
- 37.2-49.7 kWh
- Strongest window
- 12:00-16:00
- Confidence
- medium
How to read and use the data
Ioannina 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
Ioannina's PVGIS specific yield is about 1,446 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)13.7 kWh11.2 kWh–14.9 kWhPVGIS typical year4,339 kWh/year
5 kWpTomorrow estimate (likely range)22.8 kWh18.6 kWh–24.9 kWhPVGIS typical year7,231 kWh/year
10 kWpTomorrow estimate (likely range)45.5 kWh37.2 kWh–49.7 kWhPVGIS typical year14,462 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 22.8 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 13.7 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 Ioannina?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 22.8 kWh for Tuesday, September 1, 2026, with a scaled likely range of 18.6 kWh–24.9 kWh. This is a linear reference-system estimate, not a site survey.
What does 1,446 kWh/kWp mean for Ioannina?
It means the PVGIS multi-year profile produces about 1,446 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 7,231 kWh in a typical year before site-specific adjustments.
Is the Ioannina 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 Ioannina?
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 Ioannina
A standard 10 kWp system produces about 14,462 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
884Jan
916Feb
1178Mar
1264Apr
1365May
1420Jun
1579Jul
1571Aug
1337Sep
1223Oct
901Nov
826Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Ioannina's solar profile different?The typical annual yield is about 1,446 kWh per installed kWp, ranking Ioannina #6 of 6 modelled locations in Greece. That is 5% below the median of the 6 Greece 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 output884 kWhDaily average28.5 kWh/dayYear-to-year variation±184 kWh
MonthFebruaryMonthly output916 kWhDaily average32.7 kWh/dayYear-to-year variation±186 kWh
MonthMarchMonthly output1,178 kWhDaily average38.0 kWh/dayYear-to-year variation±184 kWh
MonthAprilMonthly output1,264 kWhDaily average42.1 kWh/dayYear-to-year variation±127 kWh
MonthMayMonthly output1,365 kWhDaily average44.0 kWh/dayYear-to-year variation±133 kWh
MonthJuneMonthly output1,420 kWhDaily average47.3 kWh/dayYear-to-year variation±97 kWh
MonthJulyMonthly output1,579 kWhDaily average51.0 kWh/dayYear-to-year variation±61 kWh
MonthAugustMonthly output1,571 kWhDaily average50.7 kWh/dayYear-to-year variation±76 kWh
MonthSeptemberMonthly output1,337 kWhDaily average44.5 kWh/dayYear-to-year variation±75 kWh
MonthOctoberMonthly output1,223 kWhDaily average39.5 kWh/dayYear-to-year variation±140 kWh
MonthNovemberMonthly output901 kWhDaily average30.0 kWh/dayYear-to-year variation±166 kWh
MonthDecemberMonthly output826 kWhDaily average26.6 kWh/dayYear-to-year variation±186 kWh
Nearby solar forecasts
Compare Ioannina with nearby cities
![SilentResident (compilation, sources to attribute see above; if any of the sources used in the Montage are removed from Wikimedia Commons, or better ones are found, please inform its creator so that they can update it. You can contact the creator by leaving a message here: [1] )](https://commons.wikimedia.org/wiki/File:Ioannina_Montage_L.png){kind=link}
Tomorrow, in one email
Get Ioannina'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.