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2021-09-26
Micro-inverters can solve the "short-board effect" of PV power generation
Generally speaking, most BIPV systems are installed on the facade of buildings. Due to the angle of light, shadows, dust, etc., the power generation of a single module will inevitably be different.
In the PV system using string inverters, the PV components in it are connected in series. The failure or power drop of a certain PV panel will greatly reduce the power output of all components due to the "short board effect". , Resulting in a decline in the power generation of the PV system.
However, if micro-inverters are used in the BIPV system, then the PV panel components are no longer simply connected in series. The micro-inverter has an independent MPPT for each PV panel. This design can ensure that when the output power of one of the PV panels is severely reduced, the PV panel will not affect the maximum power output of other high-quality PV panels.
In addition, the micro-inverter adopts the latest semiconductor technology and an IP67 package with a potting process. The designed service life is 25 years and the same as the component life. There is no need for secondary investment during the life cycle of the PV power station, reducing investment risks.
In recent years, the cost of energy storage batteries has been declining. Many countries have introduced separate subsidies for household energy storage. The market demand for energy storage products is expanding. Many users are very interested in adding energy storage systems to PV power generation systems.
Although the price of micro-inverters is still relatively high compared with other types of products, with the continuous popularization and application of high-power PV modules in the future, the cost per watt of micro-inverters will be further reduced. In addition, the multi-channel MPPT can improve the power generation gain of the entire power station, the safety of the DC side, the service life, and the reduction of LCOE (levelling cost per kWh of electricity), which will make it more competitive.
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.