Location data · Schleswig-Holstein
Sun hours in Heide
How sunny is Heide? Over a year the sun delivers 1,255 kilowatt-hours onto every square metre here — in June roughly 7 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 3.44 peak sun hours per day in Heide. In 9 out of 10 years at least 1,179 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.44 kWh/m²/d
- P90 annual total
- 1,179 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 0.4°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.01 | 1.96 | 3.40 | 5.05 | 5.46 | 5.65 | 5.36 | 4.78 | 3.89 | 2.53 | 1.32 | 0.78 |
| P90 | 0.82 | 1.58 | 2.72 | 4.06 | 4.49 | 4.93 | 4.76 | 4.01 | 3.23 | 1.97 | 1.03 | 0.62 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Heide. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Heide
The annual optimum for Heide is 40° south; anything between 25° and 52° counts as equivalent (below 2% difference). For winter operation (off-grid) 70° is optimal, for summer use 20°. Flat-laid modules lose 15.3 % versus the optimum. Adjusting twice a year would add 2.6 % here, monthly adjustment 3.3 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Heide?
A vertical south-facing railing in Heide harvests 912 kWh/m² per year — 73 % 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 122 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →