Location data · Bavaria
Sun hours in Aschaffenburg
How sunny is Aschaffenburg? Over a year the sun delivers 1,281 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 Aschaffenburg. In 9 out of 10 years at least 1,194 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
- 1,194 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 13.8°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.20 | 2.18 | 3.44 | 4.84 | 5.09 | 5.48 | 5.46 | 4.98 | 4.24 | 2.70 | 1.42 | 1.03 |
| P90 | 0.81 | 1.57 | 2.64 | 4.06 | 4.09 | 4.69 | 4.64 | 4.19 | 3.56 | 2.23 | 1.05 | 0.80 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Aschaffenburg. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Aschaffenburg
The annual optimum for Aschaffenburg is 35° south; anything between 23° and 49° counts as equivalent (below 2% difference). For winter operation (off-grid) 60° is optimal, for summer use 20°. Flat-laid modules lose 13.9 % versus the optimum. Adjusting twice a year would add 2.4 % here, monthly adjustment 3.2 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Aschaffenburg?
A vertical south-facing railing in Aschaffenburg harvests 898 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 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 →
Neighbouring places compared
- Rodgau3.74 kWh/m²/d20 km
- Groß-Umstadt3.59 kWh/m²/d20 km
- Hanau3.73 kWh/m²/d24 km