Solar charge controllers or solar charge regulators monitor the condition of your battery and control the charge rate. They play an important role in prolonging the life of your solar batteries by protecting batteries from being overcharged or from being completely discharged, both of which significantly reduce battery lifespan.
In addition to having a built-in USB port for powering or charging external USB devices, these solar charge controllers include a number of important features.
Low cost PWM (Pulse Width Modulation) Solar Charge Controllers are available in a variety of current and voltage options. Specifications: