Location data · Baden-Württemberg
Sun hours in Reutlingen
How sunny is Reutlingen? Over a year the sun delivers 1,362 kilowatt-hours onto every square metre here — in June roughly 4 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 3.73 peak sun hours per day in Reutlingen. In 9 out of 10 years at least 1,270 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.73 kWh/m²/d
- P90 annual total
- 1,270 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 11.5°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.49 | 2.64 | 3.76 | 4.72 | 4.91 | 5.51 | 5.57 | 5.08 | 4.50 | 3.17 | 1.95 | 1.43 |
| P90 | 1.11 | 1.87 | 2.78 | 3.68 | 4.32 | 4.64 | 4.80 | 4.42 | 3.85 | 2.40 | 1.39 | 1.04 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Reutlingen. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Reutlingen
The annual optimum for Reutlingen is 35° south; anything between 24° and 51° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 15.1 % versus the optimum. Adjusting twice a year would add 3.0 % here, monthly adjustment 4.0 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Reutlingen?
A vertical south-facing railing in Reutlingen harvests 965 kWh/m² per year — 71 % 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 103 % 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
- Tübingen3.90 kWh/m²/d12 km
- Sindelfingen3.85 kWh/m²/d27 km
- Herrenberg4.00 kWh/m²/d27 km