Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Friday, October 23, 2026: 8.0 kWh from the 10 kWp reference system, with a likely range of 5.0 kWh–10.8 kWh. It changes with the next weather forecast.
Germany · 10 kWp reference system
Jena solar forecast and PV yield
Forecast target: . Any “tomorrow” label on this page refers to this dated target.
- Tomorrow's forecast
- 8.0 kWh 10 kWp reference system
- Typical annual output
- 10,527 kWh 10 kWp reference system
- Typical specific yield
- 1,053 kWh/kWp Per year
Friday, October 23, 2026
About 8.0 kWh tomorrow
For a standard 10 kWp south-facing system in Jena, GridPassport estimates 8.0 kWh on Friday, October 23, 2026, with a likely range of 5.0-10.8 kWh. The strongest production window is expected at 12:00-16:00 local time.
Updated Oct 22, 2026, 04:01 AM GMT+2 · Automatically refreshed- Likely range
- 5.0-10.8 kWh
- Strongest window
- 12:00-16:00
- Confidence
- medium
Typical year
Solar production month by month in Jena
A standard 10 kWp system produces about 10,527 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
378Jan
567Feb
924Mar
1173Apr
1279May
1267Jun
1271Jul
1161Aug
998Sep
725Oct
443Nov
341Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Jena's solar profile different?The typical annual yield is about 1,053 kWh per installed kWp, ranking Jena #31 of 77 modelled locations in Germany. That is 1% above the median of the 77 Germany locations in this dataset. May is typically the strongest month and December the weakest; the stronger month produces about 3.8 times as much.
See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuaryMonthly output378 kWhDaily average12.2 kWh/dayYear-to-year variation±88 kWh
MonthFebruaryMonthly output567 kWhDaily average20.2 kWh/dayYear-to-year variation±121 kWh
MonthMarchMonthly output924 kWhDaily average29.8 kWh/dayYear-to-year variation±162 kWh
MonthAprilMonthly output1,173 kWhDaily average39.1 kWh/dayYear-to-year variation±185 kWh
MonthMayMonthly output1,279 kWhDaily average41.3 kWh/dayYear-to-year variation±180 kWh
MonthJuneMonthly output1,267 kWhDaily average42.2 kWh/dayYear-to-year variation±129 kWh
MonthJulyMonthly output1,271 kWhDaily average41.0 kWh/dayYear-to-year variation±127 kWh
MonthAugustMonthly output1,161 kWhDaily average37.5 kWh/dayYear-to-year variation±123 kWh
MonthSeptemberMonthly output998 kWhDaily average33.3 kWh/dayYear-to-year variation±155 kWh
MonthOctoberMonthly output725 kWhDaily average23.4 kWh/dayYear-to-year variation±144 kWh
MonthNovemberMonthly output443 kWhDaily average14.8 kWh/dayYear-to-year variation±111 kWh
MonthDecemberMonthly output341 kWhDaily average11.0 kWh/dayYear-to-year variation±78 kWh
How to read and use the data
Jena 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
Jena's PVGIS specific yield is about 1,053 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, May 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)2.4 kWh1.5 kWh–3.2 kWhPVGIS typical year3,158 kWh/year
5 kWpTomorrow estimate (likely range)4.0 kWh2.5 kWh–5.4 kWhPVGIS typical year5,263 kWh/year
10 kWpTomorrow estimate (likely range)8.0 kWh5.0 kWh–10.8 kWhPVGIS typical year10,527 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 4.0 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 2.4 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 Jena?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 4.0 kWh for Friday, October 23, 2026, with a scaled likely range of 2.5 kWh–5.4 kWh. This is a linear reference-system estimate, not a site survey.
What does 1,053 kWh/kWp mean for Jena?
It means the PVGIS multi-year profile produces about 1,053 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 5,263 kWh in a typical year before site-specific adjustments.
Is the Jena 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 Jena?
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.
Nearby solar forecasts
Compare Jena with nearby cities
Tomorrow, in one email
Get Jena'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.