Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Tuesday, September 1, 2026: 39.5 kWh from the 10 kWp reference system, with a likely range of 28.9 kWh–47.2 kWh. It changes with the next weather forecast.
Czechia · 10 kWp reference system
Ostrava solar forecast and PV yield
Photo: A. Novotná,Public domain. Cropped, resized and converted to WebP by GridPassport.
Forecast target: . Any “tomorrow” label on this page refers to this dated target.
- Tomorrow's forecast
- 39.5 kWh 10 kWp reference system
- Typical annual output
- 10,627 kWh 10 kWp reference system
- Typical specific yield
- 1,063 kWh/kWp Per year
Tuesday, September 1, 2026
About 39.5 kWh tomorrow
For a standard 10 kWp south-facing system in Ostrava, GridPassport estimates 39.5 kWh on Tuesday, September 1, 2026, with a likely range of 28.9-47.2 kWh. The strongest production window is expected at 09:00-13:00 local time.
Updated Aug 31, 2026, 01:01 AM GMT+2 · fresh snapshot- Likely range
- 28.9-47.2 kWh
- Strongest window
- 09:00-13:00
- Confidence
- medium
How to read and use the data
Ostrava 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
Ostrava's PVGIS specific yield is about 1,063 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)11.8 kWh8.7 kWh–14.2 kWhPVGIS typical year3,188 kWh/year
5 kWpTomorrow estimate (likely range)19.8 kWh14.4 kWh–23.6 kWhPVGIS typical year5,313 kWh/year
10 kWpTomorrow estimate (likely range)39.5 kWh28.9 kWh–47.2 kWhPVGIS typical year10,627 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 09:00-13:00 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 19.8 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 09:00-13:00. Never override frost protection, hygiene cycles or manufacturer limits.
Large loads
Avoid stacking appliances
A 3 kWp system scales to about 11.8 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 Ostrava?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 19.8 kWh for Tuesday, September 1, 2026, with a scaled likely range of 14.4 kWh–23.6 kWh. This is a linear reference-system estimate, not a site survey.
What does 1,063 kWh/kWp mean for Ostrava?
It means the PVGIS multi-year profile produces about 1,063 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 5,313 kWh in a typical year before site-specific adjustments.
Is the Ostrava 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 Ostrava?
Start with 09:00-13:00, 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 Ostrava
A standard 10 kWp system produces about 10,627 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
402Jan
529Feb
921Mar
1147Apr
1198May
1260Jun
1309Jul
1232Aug
1011Sep
787Oct
466Nov
364Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Ostrava's solar profile different?The typical annual yield is about 1,063 kWh per installed kWp, ranking Ostrava #5 of 6 modelled locations in Czechia. That is 2% below the median of the 6 Czechia locations in this dataset. July is typically the strongest month and December the weakest; the stronger month produces about 3.6 times as much.
See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuaryMonthly output402 kWhDaily average13.0 kWh/dayYear-to-year variation±96 kWh
MonthFebruaryMonthly output529 kWhDaily average18.9 kWh/dayYear-to-year variation±120 kWh
MonthMarchMonthly output921 kWhDaily average29.7 kWh/dayYear-to-year variation±182 kWh
MonthAprilMonthly output1,147 kWhDaily average38.3 kWh/dayYear-to-year variation±193 kWh
MonthMayMonthly output1,198 kWhDaily average38.6 kWh/dayYear-to-year variation±197 kWh
MonthJuneMonthly output1,260 kWhDaily average42.0 kWh/dayYear-to-year variation±173 kWh
MonthJulyMonthly output1,309 kWhDaily average42.2 kWh/dayYear-to-year variation±126 kWh
MonthAugustMonthly output1,232 kWhDaily average39.7 kWh/dayYear-to-year variation±113 kWh
MonthSeptemberMonthly output1,011 kWhDaily average33.7 kWh/dayYear-to-year variation±150 kWh
MonthOctoberMonthly output787 kWhDaily average25.4 kWh/dayYear-to-year variation±165 kWh
MonthNovemberMonthly output466 kWhDaily average15.5 kWh/dayYear-to-year variation±88 kWh
MonthDecemberMonthly output364 kWhDaily average11.8 kWh/dayYear-to-year variation±102 kWh
Nearby solar forecasts
Compare Ostrava with nearby cities
Tomorrow, in one email
Get Ostrava'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.