Location data · North Rhine-Westphalia
Sun hours in Düsseldorf
How sunny is Düsseldorf? Over a year the sun delivers 1,292 kilowatt-hours onto every square metre here — in June roughly 5 times as much per day as in December. “Sun hours” has two meanings: the weather report counts how long the sun shines. For solar power what matters is how much energy arrives — and that is what this page shows, as peak sun hours (hours of full sun power).
For solar planning this means: an optimally tilted, south-facing array (35°) harvests an annual average of 3.54 peak sun hours per day in Düsseldorf. In 9 out of 10 years at least 1,224 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.54 kWh/m²/d
- P90 annual total
- 1,224 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 3.8°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.36 | 2.28 | 3.57 | 4.87 | 5.18 | 5.42 | 5.22 | 4.78 | 4.13 | 2.81 | 1.69 | 1.13 |
| P90 | 1.05 | 1.68 | 2.86 | 4.06 | 4.42 | 4.65 | 4.69 | 4.01 | 3.66 | 2.50 | 1.34 | 0.83 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Düsseldorf. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Düsseldorf
The annual optimum for Düsseldorf is 40° south; anything between 25° and 52° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 15.8 % versus the optimum. Adjusting twice a year would add 3.1 % here, monthly adjustment 3.7 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Düsseldorf?
A vertical south-facing railing in Düsseldorf harvests 939 kWh/m² per year — 73 % of what an optimally tilted 35° panel yields at the same spot. December softens the penalty: with the low winter sun, the vertical plane reaches 115 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →
Neighbouring places compared
- Dormagen3.65 kWh/m²/d15 km
- Grevenbroich3.67 kWh/m²/d20 km
- Solingen3.41 kWh/m²/d22 km