The PWM Solar Charge Controller uses the classic pulse width modulation (PWM) technology to stably control the charging process of solar panels to batteries. It optimizes the charging current by adjusting the pulse width, effectively preventing overcharging and overdischarging of the battery, thereby extending the battery's lifespan. It is suitable for various types of solar power generation systems, such as household solar lighting, small and medium-sized photovoltaic water pumps, RV charging, field monitoring power supply, solar street lights and small off-grid scenarios, etc., and is suitable for ≤300W systems solutions.