The concept of solar controller and how to configure and select?

As an important part of solar street lights, the solar controller is like the human brain, which plays an important role, and it is a microcomputer data acquisition and monitoring control system with serial communication data transmission function, which can connect multiple photovoltaic systems Sub-stations carry out centralized management and remote control. In addition, it can also quickly collect the current working status of the photovoltaic system in real time, obtain the working information of the PV station at any time, and carry out detailed data accumulation to provide accurate and sufficient basis for evaluating the rationality of the PV system design.

The solar controller is related to whether the solar street lamp can be used normally, so its configuration and selection has become the most important thing. It must be determined by the specific indicators of all levels and various technologies and the sample manual provided by the manufacturer. In addition, when determining its configuration and selection, the technical indicators that need to be considered generally have the following points-

1. System working voltage

Mainly refers to the working voltage of the battery pack in the solar power generation system, and this voltage is determined according to the working voltage of the DC load or the configuration and selection of the AC inverter, generally including 12V, 24V, 48V, 110V and 220V. .

2. Rated input current and number of input channels of the solar controller

The rated input current of the solar controller depends on the input current of the solar cell module or square array, and when selecting the type, it should be greater than or equal to the input current of the solar cell. In addition, the number of input channels should be greater than or equal to the design input channels of the solar cell array. Low-power controllers generally have only one solar cell array input; high-power solar controllers usually use multiple inputs. Therefore, the output current of each battery square array should be less than or equal to the maximum current value allowed by each solar controller.

3, the rated load current of the solar controller

Mainly refers to the data of the DC output current output from the solar controller to the DC load or inverter to meet the input requirements of the load or inverter.