太阳能板倾角计算器
使用太阳能板倾角计算器确定太阳能电池板的最佳安装角度。根据地理纬度和季节变化，计算最优倾斜角和朝向，最大化全年太阳能发电量。
Optimal Annual Tilt
37.9 °
Optimal Annual Tilt vs Latitude
公式
Optimal Solar Panel Tilt Angle
The ideal tilt angle for solar panels depends primarily on latitude. Panels should face the equator (south in the Northern Hemisphere) at a tilt that maximizes annual energy capture.
Formula
Optimal Tilt = Latitude x 0.87 + 3.1°
This regression approximation works well for latitudes between 25° and 55°. Steepen by 15° in winter and flatten by 15° in summer for seasonal optimization. Adjustable mounts that change tilt seasonally can gain 5-10% more annual energy.
计算示例
Solar panels at 40°N latitude.
- 01Optimal annual tilt = 40 x 0.87 + 3.1 = 37.9°
- 02Winter tilt = 37.9 + 15 = 52.9°
- 03Summer tilt = 37.9 - 15 = 22.9°
常见问题
Should panels face due south?
In the Northern Hemisphere, yes. An azimuth of 180° (true south) maximizes energy. West-facing panels produce more afternoon energy, which may align better with peak pricing.
Does flat or vertical work?
Flat panels (0°) collect well in summer but poorly in winter. Vertical panels (90°) are poor overall but can work on building facades. The optimal angle balances all seasons.
How much does wrong tilt cost?
Being 10° off optimal typically reduces annual output by 1-3%. Being 30° off can reduce output by 10-15%, so approximate angles still work reasonably well.