The solar controller is mainly used in the solar off-grid power generation system. It can automatically control the equipment for charging the battery with multiple solar panels, coordinate the work of the solar panel, the battery and the load, monitor the charging status, and display the charging status of the solar panel to the battery. Current, voltage and battery conditions can effectively prevent battery overcharge, with anti-reverse and anti-short circuit functions.

The solar controller needs to coordinate the work of solar panels, batteries, and loads to ensure the stable operation of the entire solar off-grid power generation system. At present, there are mainly two types of MPPT solar controllers and PWM solar controllers on the market.
PWM Solar Controller
PWM, or pulse width modulation, refers to the use of the digital output of the microprocessor to control the analog circuit, which is a method of digitally encoding the level of the analog signal. Controlling analog circuits digitally can greatly reduce the cost and power consumption of the system.
The electrical structure of the PWM solar controller is relatively simple. It is mainly composed of a main power switch, a capacitor, a driver and a protection circuit. It is actually equivalent to a switch. When the component and the battery are connected together, the voltage of the component will be pulled down. to a voltage close to that of the battery pack.