Solar controller: one of the core components of solar photovoltaic system

The solar controller is an automatic control device used in the solar power system to control the multi-channel solar cell array to charge the battery and the battery to supply power to the solar inverter load. It regulates and controls the charging and discharging conditions of the battery, and according to the load The power demand controls the power output of solar cell components and storage batteries to the load, and is one of the core components of the entire photovoltaic power supply system.

The most basic function of the solar controller is to control the battery voltage and open the circuit. When the battery voltage rises to a certain level, it stops the battery charging.

In most photovoltaic systems, a controller is used to protect the battery from overcharging or overdischarging. Overcharging may vaporize the electrolyte in the battery and cause malfunctions, and overdischarging of the battery may cause premature battery failure. Both overcharge and overdischarge may damage the load, so the controller is one of the core components of the photovoltaic power generation system.

Simply put, the functions of the solar controller can be divided into:

1. Power adjustment function.

2. Communication function: background management in the form of simple indication function, protocol communication function, wireless and other forms.

3. Perfect protection function: electrical protection for reverse connection, short circuit, over current, etc.

PWM solar controller and MPPT solar controller

The PWM solar controller adopts the PWM control method, and the charging conversion efficiency is 75-80%.

The MPPT solar controller adopts the maximum power point tracking technology, which is an upgraded product of the PWM solar controller. The MPPT solar controller can detect the voltage and current of the solar panel in real time, and continuously track the maximum power, so that the system always charges the battery with the maximum power .

The MPPT tracking efficiency is 99%, and the power generation efficiency of the entire system is as high as 97%, and it has excellent management of the battery, which is divided into MPPT charging, constant voltage equalizing charging and constant voltage floating charging.