Location data · North Rhine-Westphalia
Sun hours in Olpe
How sunny is Olpe? Over a year the sun delivers 1,238 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 3.39 peak sun hours per day in Olpe. In 9 out of 10 years at least 1,163 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.39 kWh/m²/d
- P90 annual total
- 1,163 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) | 1.14 | 2.14 | 3.43 | 4.75 | 4.89 | 5.32 | 5.18 | 4.71 | 4.04 | 2.62 | 1.42 | 1.01 |
| P90 | 0.83 | 1.57 | 2.63 | 3.88 | 4.18 | 4.53 | 4.53 | 4.08 | 3.45 | 2.10 | 1.01 | 0.74 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Olpe. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Olpe
The annual optimum for Olpe is 35° south; anything between 23° and 50° counts as equivalent (below 2% difference). For winter operation (off-grid) 60° is optimal, for summer use 20°. Flat-laid modules lose 14.4 % versus the optimum. Adjusting twice a year would add 2.7 % here, monthly adjustment 3.2 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Olpe?
A vertical south-facing railing in Olpe harvests 877 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 107 % 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
- Kreuztal3.33 kWh/m²/d12 km
- Gummersbach3.28 kWh/m²/d20 km
- Siegen3.41 kWh/m²/d21 km