15W solar street light is a popular choice for illuminating pathways, residential gardens, and colony roads. These systems are typically available in two main configurations: All-in-One (AIO), where the panel, battery, and LED are integrated into a single housing, and Two-in-One, where the solar panel is a separate unit for better sun orientation.
Typical Technical Specifications
For a high-quality 15W system, you can expect the following component details:
- LED Luminary: Usually provides 1500 to 2000 Lumens (approx. 130 lm/W).
- Battery: High-performance units use a 12.8V 18Ah or 20Ah LiFePO4 (Lithium Iron Phosphate) battery, which offers a longer life cycle (up to 2000 cycles) compared to standard Lithium-ion.
- Solar Panel: Typically a 40W to 60W Mono or Polycrystalline panel. Monocrystalline panels are preferred for faster charging in low-light conditions.
- Charge Controller: Often features MPPT (Maximum Power Point Tracking) for 20-30% better efficiency than PWM controllers.
- Intelligent Features: Most models include a PIR Motion Sensor (dimming to 30% brightness when no motion is detected) and a Dusk-to-Dawn sensor for automatic operation.
