English
What Determines the PV Array Installation Tilt Angle?
2023-01-23 16:42
The installation tilt angle of a PV array is mainly determined by the longitude, latitude and optimum irradiation of the installation region. Due to installation constraints, the module tilt angle can be adjusted appropriately when the optimum angle cannot be achieved.
Optimum installation tilt angles of PV modules in major Chinese cities:
| City | Latitude Φ | Optimum tilt angle | City | Latitude Φ | Optimum tilt angle |
|---|---|---|---|---|---|
| Harbin | 45.68 | Φ+1 | Hangzhou | 30.23 | Φ-5 |
| Changchun | 43.90 | Φ+1 | Nanchang | 28.67 | Φ-9 |
| Shenyang | 41.77 | Φ+1 | Fuzhou | 26.08 | Φ-7 |
| Beijing | 39.8 | Φ+1 | Jinan | 36.68 | Φ-2 |
| Tianjin | 39.10 | Φ+1 | Zhengzhou | 34.72 | Φ-3 |
| Hohhot | 40.78 | Φ+1 | Wuhan | 30.63 | Φ-6 |
| Taiyuan | 37.78 | Φ+2 | Changsha | 28.20 | Φ-8 |
| Urumqi | 43.78 | Φ+1 | Guangzhou | 23.13 | Φ-4 |
| Xining | 36.75 | Φ+4 | Haikou | 20.03 | Φ-5 |
| Lanzhou | 36.05 | Φ+2 | Nanning | 22.82 | Φ-6 |
| Yinchuan | 38.48 | Φ+1 | Chengdu | 30.67 | Φ-9 |
| Xi an | 34.30 | Φ-2 | Guiyang | 26.58 | Φ-10 |
| Shanghai | 31.17 | Φ-5 | Kunming | 25.02 | Φ-6 |
| Nanjing | 32.00 | Φ-4 | Lhasa | 29.70 | Φ+6 |
| Hefei | 31.85 | Φ-5 |