Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Friday, October 23, 2026: 3.3 kWh from the 10 kWp reference system, with a likely range of 1.9 kWh–4.6 kWh. It changes with the next weather forecast.
Netherlands · 10 kWp reference system
Assen solar forecast and PV yield
Forecast target: . Any “tomorrow” label on this page refers to this dated target.
- Tomorrow's forecast
- 3.3 kWh 10 kWp reference system
- Typical annual output
- 9,906 kWh 10 kWp reference system
- Typical specific yield
- 991 kWh/kWp Per year
Friday, October 23, 2026
About 3.3 kWh tomorrow
For a standard 10 kWp south-facing system in Assen, GridPassport estimates 3.3 kWh on Friday, October 23, 2026, with a likely range of 1.9-4.6 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
- 1.9-4.6 kWh
- Strongest window
- 12:00-16:00
- Confidence
- medium
Typical year
Solar production month by month in Assen
A standard 10 kWp system produces about 9,906 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
302Jan
474Feb
873Mar
1195Apr
1262May
1243Jun
1226Jul
1142Aug
934Sep
639Oct
361Nov
255Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Assen's solar profile different?The typical annual yield is about 991 kWh per installed kWp, ranking Assen #37 of 37 modelled locations in Netherlands. That is 4% below the median of the 37 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 output302 kWhDaily average9.7 kWh/dayYear-to-year variation±51 kWh
MonthFebruaryMonthly output474 kWhDaily average16.9 kWh/dayYear-to-year variation±113 kWh
MonthMarchMonthly output873 kWhDaily average28.2 kWh/dayYear-to-year variation±170 kWh
MonthAprilMonthly output1,195 kWhDaily average39.9 kWh/dayYear-to-year variation±155 kWh
MonthMayMonthly output1,262 kWhDaily average40.7 kWh/dayYear-to-year variation±144 kWh
MonthJuneMonthly output1,243 kWhDaily average41.4 kWh/dayYear-to-year variation±139 kWh
MonthJulyMonthly output1,226 kWhDaily average39.5 kWh/dayYear-to-year variation±159 kWh
MonthAugustMonthly output1,142 kWhDaily average36.8 kWh/dayYear-to-year variation±121 kWh
MonthSeptemberMonthly output934 kWhDaily average31.1 kWh/dayYear-to-year variation±99 kWh
MonthOctoberMonthly output639 kWhDaily average20.6 kWh/dayYear-to-year variation±119 kWh
MonthNovemberMonthly output361 kWhDaily average12.0 kWh/dayYear-to-year variation±61 kWh
MonthDecemberMonthly output255 kWhDaily average8.2 kWh/dayYear-to-year variation±67 kWh
How to read and use the data
Assen 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
Assen's PVGIS specific yield is about 991 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)1.0 kWh0.6 kWh–1.4 kWhPVGIS typical year2,972 kWh/year
5 kWpTomorrow estimate (likely range)1.6 kWh0.9 kWh–2.3 kWhPVGIS typical year4,953 kWh/year
10 kWpTomorrow estimate (likely range)3.3 kWh1.9 kWh–4.6 kWhPVGIS typical year9,906 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 1.6 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 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 1.0 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 Assen?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 1.6 kWh for Friday, October 23, 2026, with a scaled likely range of 0.9 kWh–2.3 kWh. This is a linear reference-system estimate, not a site survey.
What does 991 kWh/kWp mean for Assen?
It means the PVGIS multi-year profile produces about 991 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 4,953 kWh in a typical year before site-specific adjustments.
Is the Assen 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 Assen?
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 Assen with nearby cities
Tomorrow, in one email
Get Assen'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.