Location data · Hesse
Sun hours in Kassel
How sunny is Kassel? Over a year the sun delivers 1,223 kilowatt-hours onto every square metre here — in June roughly 6 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 3.35 peak sun hours per day in Kassel. In 9 out of 10 years at least 1,146 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.35 kWh/m²/d
- P90 annual total
- 1,146 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 10.3°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.09 | 1.96 | 3.38 | 4.72 | 5.01 | 5.33 | 5.14 | 4.71 | 4.01 | 2.55 | 1.33 | 0.90 |
| P90 | 0.81 | 1.43 | 2.38 | 3.90 | 4.03 | 4.60 | 4.46 | 4.12 | 3.29 | 2.08 | 0.90 | 0.64 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Kassel. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Kassel
The annual optimum for Kassel is 35° south; anything between 22° and 49° counts as equivalent (below 2% difference). For winter operation (off-grid) 60° is optimal, for summer use 20°. Flat-laid modules lose 13.3 % versus the optimum. Adjusting twice a year would add 2.4 % here, monthly adjustment 3.1 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Kassel?
A vertical south-facing railing in Kassel harvests 858 kWh/m² per year — 70 % 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 108 % 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
- Hann. Münden3.50 kWh/m²/d15 km
- Warburg3.51 kWh/m²/d31 km
- Göttingen3.52 kWh/m²/d39 km