Solar Street Light

Overview

The solar street light is a self-contained outdoor luminaire that needs no grid connection. A monocrystalline panel charges a battery by day through an MPPT controller, and at dusk an ambient-light sensor switches the LED module on, dimming it up on detected motion to stretch the charge across the night. The whole system, panel, battery, LEDs, and electronics, integrates into one die-cast housing on a pole arm.

Construction

Energy is captured by the Solar Panel, a framed monocrystalline laminate with a sealed junction box and bypass diode. It charges the Battery Pack, a LiFePO4/li-ion pack of cylindrical cells with a protection BMS in a sealed housing, sized for two to three days of autonomy.

Light comes from the LED Module, a metal-core PCB of high-power LED packages behind a PMMA optic shaping the street beam. The brain is the Charge / Control Board, an MPPT charge controller and lighting controller carrying a microcontroller, the MPPT power stage, a PIR motion sensor, and an ambient-light sensor for dusk-to-dawn and motion dimming logic.

Everything mounts in the die-cast Housing & Heat Sink, which doubles as the LED heat sink, sealed by the Optical Cover optical cover and gasket. The Pole-Mount Bracket clamps the fixture to a pole or wall arm with angle adjustment, and a Remote Control sets brightness, timer, and motion modes.