Location data · Bavaria
Sun hours in Passau
How sunny is Passau? Over a year the sun delivers 1,404 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 3.85 peak sun hours per day in Passau. In 9 out of 10 years at least 1,331 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.85 kWh/m²/d
- P90 annual total
- 1,331 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 3.1°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.57 | 2.70 | 3.86 | 5.12 | 5.15 | 5.66 | 5.72 | 5.28 | 4.46 | 3.29 | 1.89 | 1.40 |
| P90 | 1.09 | 2.21 | 2.88 | 4.05 | 4.24 | 4.80 | 5.12 | 4.56 | 3.72 | 2.53 | 1.48 | 0.99 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Passau. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Passau
The annual optimum for Passau is 35° south; anything between 23° and 50° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 14.8 % versus the optimum. Adjusting twice a year would add 2.6 % here, monthly adjustment 3.6 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Passau?
A vertical south-facing railing in Passau harvests 987 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 109 % 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
- Deggendorf3.92 kWh/m²/d46 km
- Linz3.94 kWh/m²/d69 km
- Straubing3.86 kWh/m²/d72 km