A solar inverter is a conversion device that converts the direct current generated by the photovoltaic array into alternating current. A solar controller is a device whose basic function is similar to a voltage regulator to protect the battery from overcharging and discharging.

The connection between the solar inverter and the solar controller requires the connection of an intermediate storage device. Usually a battery is selected, and the solar controller is connected to the battery for charging.

Solar controllers are divided into combinational logic controllers and microprogrammed controllers. The design of combinational logic controllers is complex and cumbersome. Once a design is complete, it cannot be modified or extended, but it is fast. The microprogram controller is easy to design, simple in structure, and easy to modify or expand. To modify the function of a machine instruction, just rewrite the corresponding microprogram; to add a machine instruction, simply add a microprogram to the control memory, but It does this by executing a microprogram. The specific comparison is as follows: Combinatorial logic controllers, also known as hard-wired controllers, are composed of logic circuits and rely entirely on hardware to implement the functions of instructions.