Location data · Thuringia
Sun hours in Greiz
How sunny is Greiz? Over a year the sun delivers 1,310 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 3.59 peak sun hours per day in Greiz. In 9 out of 10 years at least 1,225 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.59 kWh/m²/d
- P90 annual total
- 1,225 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 3.8°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.32 | 2.28 | 3.44 | 4.82 | 5.14 | 5.43 | 5.37 | 4.87 | 4.19 | 2.98 | 1.82 | 1.33 |
| P90 | 0.99 | 1.60 | 2.56 | 3.81 | 4.27 | 4.90 | 4.76 | 4.00 | 3.37 | 2.43 | 1.36 | 0.98 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Greiz. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Greiz
The annual optimum for Greiz 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 15.7 % versus the optimum. Adjusting twice a year would add 3.4 % here, monthly adjustment 4.5 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Greiz?
A vertical south-facing railing in Greiz harvests 953 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 123 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →