Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Monday, October 5, 2026: 39.3 kWh from the 10 kWp reference system, with a likely range of 31.5 kWh–43.0 kWh. It changes with the next weather forecast.
Netherlands · 10 kWp reference system
Leiden solar forecast and PV yield
Forecast target: . Any “tomorrow” label on this page refers to this dated target.
- Tomorrow's forecast
- 39.3 kWh 10 kWp reference system
- Typical annual output
- 10,619 kWh 10 kWp reference system
- Typical specific yield
- 1,062 kWh/kWp Per year
Monday, October 5, 2026
About 39.3 kWh tomorrow
For a standard 10 kWp south-facing system in Leiden, GridPassport estimates 39.3 kWh on Monday, October 5, 2026, with a likely range of 31.5-43.0 kWh. The strongest production window is expected at 13:00-17:00 local time.
Updated Oct 4, 2026, 11:01 PM GMT+2 · Automatically refreshed- Likely range
- 31.5-43.0 kWh
- Strongest window
- 13:00-17:00
- Confidence
- medium
How to read and use the data
Leiden 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
Leiden's PVGIS specific yield is about 1,062 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)11.8 kWh9.4 kWh–12.9 kWhPVGIS typical year3,186 kWh/year
5 kWpTomorrow estimate (likely range)19.6 kWh15.8 kWh–21.5 kWhPVGIS typical year5,309 kWh/year
10 kWpTomorrow estimate (likely range)39.3 kWh31.5 kWh–43.0 kWhPVGIS typical year10,619 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 13:00-17:00 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 19.6 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 13:00-17:00. 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 Leiden?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 19.6 kWh for Monday, October 5, 2026, with a scaled likely range of 15.8 kWh–21.5 kWh. This is a linear reference-system estimate, not a site survey.
What does 1,062 kWh/kWp mean for Leiden?
It means the PVGIS multi-year profile produces about 1,062 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 5,309 kWh in a typical year before site-specific adjustments.
Is the Leiden 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 Leiden?
Start with 13:00-17:00, 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 Leiden
A standard 10 kWp system produces about 10,619 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
359Jan
530Feb
957Mar
1272Apr
1365May
1336Jun
1313Jul
1191Aug
964Sep
658Oct
397Nov
276Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Leiden's solar profile different?The typical annual yield is about 1,062 kWh per installed kWp, ranking Leiden #4 of 22 modelled locations in Netherlands. That is 3% above the median of the 22 Netherlands locations in this dataset. May is typically the strongest month and December the weakest; the stronger month produces about 5.0 times as much.
See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuaryMonthly output359 kWhDaily average11.6 kWh/dayYear-to-year variation±56 kWh
MonthFebruaryMonthly output530 kWhDaily average18.9 kWh/dayYear-to-year variation±139 kWh
MonthMarchMonthly output957 kWhDaily average30.9 kWh/dayYear-to-year variation±173 kWh
MonthAprilMonthly output1,272 kWhDaily average42.4 kWh/dayYear-to-year variation±157 kWh
MonthMayMonthly output1,365 kWhDaily average44.0 kWh/dayYear-to-year variation±141 kWh
MonthJuneMonthly output1,336 kWhDaily average44.5 kWh/dayYear-to-year variation±130 kWh
MonthJulyMonthly output1,313 kWhDaily average42.4 kWh/dayYear-to-year variation±150 kWh
MonthAugustMonthly output1,191 kWhDaily average38.4 kWh/dayYear-to-year variation±116 kWh
MonthSeptemberMonthly output964 kWhDaily average32.1 kWh/dayYear-to-year variation±75 kWh
MonthOctoberMonthly output658 kWhDaily average21.2 kWh/dayYear-to-year variation±101 kWh
MonthNovemberMonthly output397 kWhDaily average13.3 kWh/dayYear-to-year variation±61 kWh
MonthDecemberMonthly output276 kWhDaily average8.9 kWh/dayYear-to-year variation±62 kWh
Nearby solar forecasts
Compare Leiden with nearby cities
Tomorrow, in one email
Get Leiden'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.