Location data · North Rhine-Westphalia
Sun hours in Ahaus
How sunny is Ahaus? Over a year the sun delivers 1,282 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 3.51 peak sun hours per day in Ahaus. In 9 out of 10 years at least 1,199 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.51 kWh/m²/d
- P90 annual total
- 1,199 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 0.4°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.19 | 2.09 | 3.53 | 4.93 | 5.24 | 5.49 | 5.29 | 4.85 | 4.08 | 2.76 | 1.59 | 1.03 |
| P90 | 0.91 | 1.50 | 2.94 | 4.16 | 4.33 | 4.72 | 4.72 | 4.30 | 3.58 | 2.20 | 1.25 | 0.74 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Ahaus. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Ahaus
The annual optimum for Ahaus is 40° south; anything between 26° and 52° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 16.6 % versus the optimum. Adjusting twice a year would add 3.1 % here, monthly adjustment 4.0 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Ahaus?
A vertical south-facing railing in Ahaus harvests 933 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 113 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →