The smart switch will add a "safety lock" to the PV power generation system

　　Ensuring the safety of the PV power generation system is the most important thing in the operation and management of the PV power generation system.

　　As we all know, the PV power generation system using micro inverters, due to the parallel relationship between the components, there is no voltage superposition between each other, and the DC voltage is less than 60 volts. This design completely eliminates the risk of fire caused by high-voltage direct current, and at the same time solves the problem of preventing firefighters from rescuing due to high-voltage direct current when the house is on fire.

　　Large-scale PV power generation systems, because of their huge scale, usually use string inverters. The DC voltage of a single module in this scheme is as high as 800V~1000V. When the system runs for many years, the insulation layer of the wire is gradually corroded, and its inner metal wire is easily exposed, and finally reaches the critical value of generating a DC arc, which leads to the occurrence of a fire.

　　On the other hand, when a fire occurs in a large-scale PV power generation system, although the switch on the AC side can be closed to cut off the output of AC power, as far as the DC side of the PV array is concerned, there will be high voltage as long as there is light, especially when the voltage on the DC side reaches 800V~1000V or more, the risk is extremely high. The voltage and arc generated by it can seriously harm the personal safety of firefighters and may even cause them to die.

　　How to realize the power station safety of the string inverter system is the focus of the PV industry has been serious thinking and efforts to improve. Smart shut-off devices are basically adopted now. They are small in size, light in weight, and easy to install. They can be directly stuck on the module frame or pasted on the module back panel to quickly shut down the system components.

　　In addition, the smart switch is a fast shut-off device with intelligent monitoring function. The AC switch can quickly close the component output, monitor the working parameters of the component, and facilitate system operation and maintenance.

　　The smart switch will add a "safety lock" to the PV power generation system to prevent possible fire hazards and effectively guarantee the safety of the PV power generation system!

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, PV energy storage, UPS, data center and other industries.

　　Solar power generation system with lithium battery energy storage system is a very promising clean energy.