Location data · Saarland
Sun hours in Merzig
How sunny is Merzig? Over a year the sun delivers 1,272 kilowatt-hours onto every square metre here — in June roughly 14 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 3.49 peak sun hours per day in Merzig. In 9 out of 10 years at least 1,171 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.49 kWh/m²/d
- P90 annual total
- 1,171 kWh/m²
- Optimal tilt
- 30°
- Terrain horizon max.
- 19.1°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 0.77 | 2.08 | 3.64 | 5.05 | 5.23 | 5.68 | 5.63 | 5.05 | 4.47 | 2.66 | 1.09 | 0.41 |
| P90 | 0.62 | 1.46 | 2.79 | 4.15 | 4.26 | 4.90 | 4.98 | 4.32 | 3.95 | 2.05 | 0.91 | 0.38 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Merzig. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Merzig
The annual optimum for Merzig is 30° south; anything between 18° and 46° counts as equivalent (below 2% difference). For winter operation (off-grid) 50° is optimal, for summer use 20°. Flat-laid modules lose 10.9 % versus the optimum. Adjusting twice a year would add 1.6 % here, monthly adjustment 2.2 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Merzig?
A vertical south-facing railing in Merzig harvests 848 kWh/m² per year — 67 % 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 60 % 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
- Völklingen3.71 kWh/m²/d27 km
- Trier3.50 kWh/m²/d35 km
- Saarbrücken3.69 kWh/m²/d36 km