What is a Solar Charge Controller? A solar charge controller is a device that regulates the flow of energy from solar panels to a battery, preventing overcharging and damage to the battery. Types of Solar Charge Controllers 1. PWM (Pulse Width Modulation) Controllers: Simple, inexpensive, and suitable for small systems. 2. MPPT (Maximum Power Point Tracking) Controllers: More efficient, complex, and suitable for larger systems. 3. Simple ON/OFF Controllers: Basic controllers that disconnect the solar panel when the battery is fully charged.
