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 43.7 kWh–51.4 kWh. It changes with the next weather forecast.
Greece · 10 kWp reference system
Patras 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
- 49.8 kWh 10 kWp reference system
- Typical annual output
- 15,623 kWh 10 kWp reference system
- Typical specific yield
- 1,562 kWh/kWp Per year
Tuesday, September 1, 2026
About 49.8 kWh tomorrow
For a standard 10 kWp south-facing system in Patras, GridPassport estimates 49.8 kWh on Tuesday, September 1, 2026, with a likely range of 43.7-51.4 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
- 43.7-51.4 kWh
- Strongest window
- 12:00-16:00
- Confidence
- high
How to read and use the data
Patras 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
Patras's PVGIS specific yield is about 1,562 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)14.9 kWh13.1 kWh–15.4 kWhPVGIS typical year4,687 kWh/year
5 kWpTomorrow estimate (likely range)24.9 kWh21.9 kWh–25.7 kWhPVGIS typical year7,812 kWh/year
10 kWpTomorrow estimate (likely range)49.8 kWh43.7 kWh–51.4 kWhPVGIS typical year15,623 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 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 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 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 Patras?
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 21.9 kWh–25.7 kWh. This is a linear reference-system estimate, not a site survey.
What does 1,562 kWh/kWp mean for Patras?
It means the PVGIS multi-year profile produces about 1,562 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 7,812 kWh in a typical year before site-specific adjustments.
Is the Patras 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 Patras?
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 Patras
A standard 10 kWp system produces about 15,623 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
944Jan
964Feb
1306Mar
1405Apr
1496May
1551Jun
1669Jul
1662Aug
1446Sep
1266Oct
1017Nov
897Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Patras's solar profile different?The typical annual yield is about 1,562 kWh per installed kWp, ranking Patras #3 of 6 modelled locations in Greece. That is 3% above 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 output944 kWhDaily average30.4 kWh/dayYear-to-year variation±146 kWh
MonthFebruaryMonthly output964 kWhDaily average34.4 kWh/dayYear-to-year variation±160 kWh
MonthMarchMonthly output1,306 kWhDaily average42.1 kWh/dayYear-to-year variation±156 kWh
MonthAprilMonthly output1,405 kWhDaily average46.8 kWh/dayYear-to-year variation±122 kWh
MonthMayMonthly output1,496 kWhDaily average48.3 kWh/dayYear-to-year variation±127 kWh
MonthJuneMonthly output1,551 kWhDaily average51.7 kWh/dayYear-to-year variation±60 kWh
MonthJulyMonthly output1,669 kWhDaily average53.8 kWh/dayYear-to-year variation±31 kWh
MonthAugustMonthly output1,662 kWhDaily average53.6 kWh/dayYear-to-year variation±48 kWh
MonthSeptemberMonthly output1,446 kWhDaily average48.2 kWh/dayYear-to-year variation±86 kWh
MonthOctoberMonthly output1,266 kWhDaily average40.9 kWh/dayYear-to-year variation±136 kWh
MonthNovemberMonthly output1,017 kWhDaily average33.9 kWh/dayYear-to-year variation±141 kWh
MonthDecemberMonthly output897 kWhDaily average28.9 kWh/dayYear-to-year variation±142 kWh
Nearby solar forecasts
Compare Patras 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:Patras_Montage_L.png){kind=link}
Tomorrow, in one email
Get Patras'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.