Photovoltaic controller is an automatic control device used in photovoltaic power generation systems to control multiple photovoltaic cell arrays to charge batteries and batteries to supply power to photovoltaic inverter loads.

The main functions of the photovoltaic controller are high-voltage (HVD) disconnection and recovery functions, under-voltage (LVG) alarm and recovery functions, and low-voltage (LVD) disconnection and recovery functions to prevent excessive battery discharge, and can protect system circuits and lightning protection Breakdown. 

The photovoltaic controller uses a high-speed CPU microprocessor and a high-precision A/D analog-to-digital converter. It is a microcomputer data acquisition and monitoring control system. It can quickly collect the current working status of the photovoltaic system in real time and obtain the working information of the photovoltaic power station at any time. It can also accumulate historical data of the photovoltaic power station in detail, providing a basis for evaluating the rationality of the design of the photovoltaic power generation system and inspecting the reliability of the quality of system components. Accurate and sufficient basis. 

Photovoltaic controllers can be classified into single-channel controllers, multi-channel controllers, pulse-width modulation types, intelligent controllers, etc.