Location data · Baden-Württemberg
Sun hours in Lahr/Schwarzwald
How sunny is Lahr/Schwarzwald? Over a year the sun delivers 1,457 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 3.99 peak sun hours per day in Lahr/Schwarzwald. In 9 out of 10 years at least 1,364 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.99 kWh/m²/d
- P90 annual total
- 1,364 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 2.3°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.76 | 2.75 | 4.08 | 5.17 | 5.29 | 5.93 | 5.85 | 5.41 | 4.89 | 3.26 | 1.93 | 1.53 |
| P90 | 1.36 | 1.98 | 3.01 | 4.09 | 4.45 | 5.20 | 4.87 | 4.60 | 4.39 | 2.66 | 1.50 | 1.07 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Lahr/Schwarzwald. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Lahr/Schwarzwald
The annual optimum for Lahr/Schwarzwald 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 17.0 % versus the optimum. Adjusting twice a year would add 3.4 % here, monthly adjustment 4.3 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Lahr/Schwarzwald?
A vertical south-facing railing in Lahr/Schwarzwald harvests 1,048 kWh/m² per year — 72 % 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 114 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →