The cost of a 1000W solar street light can vary significantly based on several factors, including 1. manufacturer reputation, 3. Generally, prices range from $800 to $5,000. These are often used for larger-scale or more customizable setups and can cost more than all-in-one models, ranging between $300 and $1,000 per unit. Entry-level (20-40W LED): Often suitable. As we zoom into solar streetlight price per unit, unit cost varies substantially by wattage and use case: Why the spread? More powerful systems require larger PV panels, bigger batteries, taller poles, and often heavier-duty mounting hardware — all increasing per-unit price.