Location data · Rhineland-Palatinate
Sun hours in Kaiserslautern
How sunny is Kaiserslautern? Over a year the sun delivers 1,344 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 3.68 peak sun hours per day in Kaiserslautern. In 9 out of 10 years at least 1,243 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.68 kWh/m²/d
- P90 annual total
- 1,243 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 8.0°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.42 | 2.42 | 3.74 | 4.99 | 5.14 | 5.62 | 5.58 | 5.04 | 4.42 | 2.91 | 1.61 | 1.23 |
| P90 | 1.09 | 1.71 | 2.88 | 4.04 | 4.41 | 4.83 | 4.97 | 4.48 | 3.85 | 2.28 | 1.29 | 0.93 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Kaiserslautern. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Kaiserslautern
The annual optimum for Kaiserslautern is 35° south; anything between 23° and 50° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 13.9 % versus the optimum. Adjusting twice a year would add 2.8 % here, monthly adjustment 3.7 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Kaiserslautern?
A vertical south-facing railing in Kaiserslautern harvests 947 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 111 % 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
- Neustadt an der Weinstraße3.93 kWh/m²/d29 km
- Pirmasens3.71 kWh/m²/d29 km
- Landau in der Pfalz3.74 kWh/m²/d37 km