Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Tuesday, September 1, 2026: 11.4 kWh from the 10 kWp reference system, with a likely range of 6.9 kWh–15.3 kWh. It changes with the next weather forecast.
Lithuania · 10 kWp reference system
Vilnius solar forecast and PV yield
Photo: Scotch Mist,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
- 11.4 kWh 10 kWp reference system
- Typical annual output
- 9,794 kWh 10 kWp reference system
- Typical specific yield
- 979 kWh/kWp Per year
Tuesday, September 1, 2026
About 11.4 kWh tomorrow
For a standard 10 kWp south-facing system in Vilnius, GridPassport estimates 11.4 kWh on Tuesday, September 1, 2026, with a likely range of 6.9-15.3 kWh. The strongest production window is expected at 15:00-19:00 local time.
Updated Aug 31, 2026, 02:01 AM GMT+3 · fresh snapshot- Likely range
- 6.9-15.3 kWh
- Strongest window
- 15:00-19:00
- Confidence
- medium
How to read and use the data
Vilnius 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
Vilnius's PVGIS specific yield is about 979 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, June 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)3.4 kWh2.1 kWh–4.6 kWhPVGIS typical year2,938 kWh/year
5 kWpTomorrow estimate (likely range)5.7 kWh3.5 kWh–7.7 kWhPVGIS typical year4,897 kWh/year
10 kWpTomorrow estimate (likely range)11.4 kWh6.9 kWh–15.3 kWhPVGIS typical year9,794 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 15:00-19:00 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 5.7 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 15:00-19:00. Never override frost protection, hygiene cycles or manufacturer limits.
Large loads
Avoid stacking appliances
A 3 kWp system scales to about 3.4 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 Vilnius?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 5.7 kWh for Tuesday, September 1, 2026, with a scaled likely range of 3.5 kWh–7.7 kWh. This is a linear reference-system estimate, not a site survey.
What does 979 kWh/kWp mean for Vilnius?
It means the PVGIS multi-year profile produces about 979 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 4,897 kWh in a typical year before site-specific adjustments.
Is the Vilnius 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 Vilnius?
Start with 15:00-19:00, 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 Vilnius
A standard 10 kWp system produces about 9,794 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
267Jan
479Feb
872Mar
1139Apr
1313May
1343Jun
1300Jul
1193Aug
930Sep
584Oct
216Nov
159Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Vilnius's solar profile different?The typical annual yield is about 979 kWh per installed kWp, ranking Vilnius #4 of 4 modelled locations in Lithuania. That is 1% below the median of the 4 Lithuania locations in this dataset. June is typically the strongest month and December the weakest; the stronger month produces about 8.4 times as much.
See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuaryMonthly output267 kWhDaily average8.6 kWh/dayYear-to-year variation±90 kWh
MonthFebruaryMonthly output479 kWhDaily average17.1 kWh/dayYear-to-year variation±115 kWh
MonthMarchMonthly output872 kWhDaily average28.1 kWh/dayYear-to-year variation±211 kWh
MonthAprilMonthly output1,139 kWhDaily average38.0 kWh/dayYear-to-year variation±172 kWh
MonthMayMonthly output1,313 kWhDaily average42.4 kWh/dayYear-to-year variation±179 kWh
MonthJuneMonthly output1,343 kWhDaily average44.8 kWh/dayYear-to-year variation±135 kWh
MonthJulyMonthly output1,300 kWhDaily average41.9 kWh/dayYear-to-year variation±136 kWh
MonthAugustMonthly output1,193 kWhDaily average38.5 kWh/dayYear-to-year variation±145 kWh
MonthSeptemberMonthly output930 kWhDaily average31.0 kWh/dayYear-to-year variation±142 kWh
MonthOctoberMonthly output584 kWhDaily average18.8 kWh/dayYear-to-year variation±170 kWh
MonthNovemberMonthly output216 kWhDaily average7.2 kWh/dayYear-to-year variation±46 kWh
MonthDecemberMonthly output159 kWhDaily average5.1 kWh/dayYear-to-year variation±42 kWh
Nearby solar forecasts
Compare Vilnius with nearby cities
Tomorrow, in one email
Get Vilnius'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.