Location data · Schleswig-Holstein
Sun hours in Flensburg
How sunny is Flensburg? Over a year the sun delivers 1,218 kilowatt-hours onto every square metre here — in June roughly 8 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 3.34 peak sun hours per day in Flensburg. In 9 out of 10 years at least 1,166 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.34 kWh/m²/d
- P90 annual total
- 1,166 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 6.9°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 0.92 | 1.71 | 3.11 | 5.00 | 5.45 | 5.63 | 5.31 | 4.75 | 3.84 | 2.41 | 1.16 | 0.68 |
| P90 | 0.70 | 1.18 | 2.39 | 3.89 | 4.53 | 4.97 | 4.64 | 4.00 | 3.29 | 1.84 | 0.83 | 0.52 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Flensburg. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Flensburg
The annual optimum for Flensburg is 40° south; anything between 26° and 52° counts as equivalent (below 2% difference). For winter operation (off-grid) 70° is optimal, for summer use 20°. Flat-laid modules lose 16.4 % versus the optimum. Adjusting twice a year would add 2.7 % here, monthly adjustment 3.6 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Flensburg?
A vertical south-facing railing in Flensburg harvests 895 kWh/m² per year — 74 % 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 119 % 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
- Schleswig3.32 kWh/m²/d31 km
- Husum3.43 kWh/m²/d42 km
- Eckernförde3.37 kWh/m²/d44 km