Designing a reliable all-in-one solar street light requires a balanced match between solar panel power, LED light power, and battery capacity.
The goal is to ensure stable performance, full-night operation, and long battery life under real environmental conditions.
🧭 1. Define Your Design Requirements
Before selecting components, confirm these parameters:
- Installation location and latitude– affects daily solar radiation.
- Required lighting hours per night– e.g., 10–12 hours.
- Backup days for cloudy/rainy weather– usually 2–3 days.
- Mounting height and lighting area– determines LED power.
⚙️ 2. Core Matching Principles
| Item | Recommended Calculation | Notes |
| LED Power (W) | Based on mounting height: 3–4M → 15–25W 5–6M → 30–40W 7–8M → 50–60W 9–10M → 80–100W | LED efficiency ≥180LM/W |
| Battery Capacity (Ah) | = LED Power × Lighting Hours × Backup Days ÷ (Battery Voltage × Depth of Discharge × Efficiency) | Common voltage: 3.2V or 12.8V (LiFePO₄) Depth of Discharge: 0.8 Efficiency: 0.9 |
| Solar Panel Power (W) | = LED Power × Lighting Hours × Backup Days ÷ (Peak Sun Hours × Charging Efficiency × Voltage) | Peak Sun Hours ≈ 4–5h/day |
🧩 3. Typical Engineering Configurations (with LiFePO₄ Battery)
| Mounting Height | LED Power | Battery Capacity | Solar Panel | Recommended Application |
| 4M | 20W | 12.8V 15-20Ah | 25W MONO | Garden, community roads |
| 5–6M | 30–40W | 12.8V 20-30Ah | 40–50W MONO | Village or secondary roads |
| 7–8M | 50–60W | 12.8V 30-40Ah | 60–80W MONO | Rural main roads |
| 9–10M | 80–100W | 12.8V 40–50Ah | 100–120W MONO | Engineering projects, intersections |
| 12M | 120–150W | 12.8V 60–80Ah | 150–180W MONO | Main roads, high-pole lighting |
💡 4. Professional Design Recommendations
- Use high-efficiency MONO solar panels(conversion efficiency >21%).
- Choose LiFePO₄ (Lithium Iron Phosphate)batteries — safe, long lifespan, excellent for high temperatures.
- Enable intelligent power management to automatically adjust brightness through the night.
- Use die-cast aluminum housing with IP65 waterproof rating for outdoor durability.
If you tell me:
- Installation height
- Location(city or country)
- Required lighting hours per night
Newskypower solar street light team will help you calculate an optimized configuration with accurate ratios for LED power, battery capacity, and solar panel size.
