Location data · Baden-Württemberg
Sun hours in Lörrach
How sunny is Lörrach? Over a year the sun delivers 1,403 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 3.84 peak sun hours per day in Lörrach. In 9 out of 10 years at least 1,278 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.84 kWh/m²/d
- P90 annual total
- 1,278 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 21.4°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.66 | 2.64 | 3.91 | 4.94 | 4.98 | 5.64 | 5.72 | 5.23 | 4.58 | 3.22 | 2.00 | 1.53 |
| P90 | 1.24 | 1.91 | 2.91 | 3.81 | 4.23 | 4.85 | 5.01 | 4.42 | 4.02 | 2.66 | 1.62 | 1.17 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Lörrach. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Lörrach
The annual optimum for Lörrach is 35° south; anything between 24° and 50° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 15.1 % 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 Lörrach?
A vertical south-facing railing in Lörrach harvests 979 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
- Basel3.96 kWh/m²/d9 km
- Aarau3.94 kWh/m²/d38 km
- Waldshut-Tiengen4.00 kWh/m²/d41 km