Location data · Bremen
Sun hours in Bremen
How sunny is Bremen? Over a year the sun delivers 1,259 kilowatt-hours onto every square metre here — in June roughly 6 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 3.45 peak sun hours per day in Bremen. In 9 out of 10 years at least 1,183 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.45 kWh/m²/d
- P90 annual total
- 1,183 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 1.1°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.08 | 2.07 | 3.35 | 4.98 | 5.22 | 5.48 | 5.27 | 4.80 | 4.08 | 2.66 | 1.41 | 0.95 |
| P90 | 0.84 | 1.53 | 2.72 | 4.11 | 4.45 | 4.95 | 4.73 | 4.22 | 3.45 | 2.12 | 1.12 | 0.71 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Bremen. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Bremen
The annual optimum for Bremen is 40° south; anything between 25° and 52° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 25°. Flat-laid modules lose 16.1 % 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 Bremen?
A vertical south-facing railing in Bremen harvests 912 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 120 % 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
- Achim3.46 kWh/m²/d16 km
- Osterholz-Scharmbeck3.42 kWh/m²/d17 km
- Ganderkesee3.41 kWh/m²/d18 km