Solar Street Light Pole Height Selection: Engineering Guide for African Roads

The Relationship Between Pole Height and Light Distribution

The optimal pole height for a solar street light depends on three factors: the road width to be illuminated, the luminaire's beam angle and light distribution type, and the required illuminance uniformity ratio. As a general rule, the mounting height should be approximately equal to the road width for single-sided arrangements, or 0.7× the road width for staggered arrangements.

Road Width	Recommended Pole Height	Arrangement	Overhang
6–8m	5–6m	Single-sided or staggered	0.5–1.0m
8–12m	7–8m	Staggered or opposite	1.0–1.5m
12–16m	8–10m	Opposite	1.5–2.0m
16–20m	10–12m	Opposite or central median	2.0–3.0m

Solar Panel Orientation at Different Pole Heights

For all-in-one solar street lights, the solar panel is integrated into the fixture. At higher mounting heights (8–12m), wind loading on the combined solar panel and luminaire assembly increases significantly. Ensure that the pole and foundation design accounts for the wind load in accordance with local standards (typically 120–160 km/h design wind speed for most African locations).