Three important parameters of photovoltaic inverters

　　The inverter, as the core component of the photovoltaic system, is responsible for converting the DC power of the photovoltaic module into AC power that is fed into the grid. The requirements of different components for the inverter are mainly reflected in the three parameters of the maximum system voltage, the maximum power point operating current Impp, and the short-circuit current Isc.

　　The maximum system voltage determines the maximum voltage range in which the module/inverter can work. Currently, there are mainly 1000V (1100V) systems and 1500V systems); the maximum power point operating current Impp represents the maximum corresponding maximum power tracking of the module/inverter Current; the short-circuit current Isc represents the limit current that the inverter string input can reach. The greater the power of the component, the greater the corresponding Imppp and Isc, and higher requirements for the inverter input capability.

　　210mm large-size silicon wafer module, due to its large silicon wafer surface area, the module has the characteristics of large output power and large current. The working current of traditional 156mm half-chip modules is close to 11A, while the working current of 210mm large silicon chip technology is often more than 17A. Combined with the current common string inverters in the industry, each MPPT input current is often only 26A. The status quo, it is easy to find that it is almost difficult for ordinary grid-connected string inverters to access 210mm large-size components with full power.

　　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, photovoltaic energy storage, UPS, data center and other industries.

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