Location data · Baden-Württemberg
Sun hours in Aalen
How sunny is Aalen? Over a year the sun delivers 1,353 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 3.71 peak sun hours per day in Aalen. In 9 out of 10 years at least 1,251 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.71 kWh/m²/d
- P90 annual total
- 1,251 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 6.5°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.50 | 2.62 | 3.79 | 4.82 | 5.01 | 5.54 | 5.62 | 5.10 | 4.39 | 2.96 | 1.71 | 1.40 |
| P90 | 1.07 | 1.92 | 2.95 | 3.82 | 4.20 | 4.72 | 4.84 | 4.35 | 3.73 | 2.23 | 1.40 | 1.11 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Aalen. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Aalen
The annual optimum for Aalen is 35° south; anything between 23° and 49° 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 2.5 % here, monthly adjustment 3.5 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Aalen?
A vertical south-facing railing in Aalen harvests 949 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 106 % 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
- Ellwangen3.84 kWh/m²/d14 km
- Heidenheim an der Brenz3.72 kWh/m²/d18 km
- Schwäbisch Gmünd3.72 kWh/m²/d22 km