Market prospect of photovoltaic inverter

At present, the photovoltaic inverter market is dominated by centralized inverter and series inverter, and the proportion of micro and other types of inverters is very small. In the market structure, the original proportion of centralized inverter is the highest. In recent years, due to the rapid development of series inverter, the proportion is also increasing.

With the continuous progress of technology, the cost of series inverter decreases rapidly and gradually approaches the cost of centralized inverter. The application of beneficial series inverter in central and eastern China is gradually expanded, and the field of distributed application is increasing. It will maintain rapid growth and further increase the market share.

The power of single machine series inverter increases continuously

The single capacity of series inverter is generally below 100kW. In the early stage of industry development, series inverter with small power is generally used. With the continuous development of power module and other technologies, market leading enterprises continue to develop and launch series inverter with large single power.

With the increase of single machine power, the series inverter can give full play to its own advantages, such as large number of mppts, wide maximum power tracking voltage range, flexible component configuration and long power generation time, which can be directly installed outdoors; At present, many large-scale ground power stations and other centralized photovoltaic power generation systems also begin to use series inverters. In the future, the single power of series inverters will continue to increase in industrial and commercial roof and ground photovoltaic power stations.

Diversified intelligent application and expansion

With the continuous development of technology, the inverter not only undertakes the function of converting DC into AC, but also undertakes the needs of more intelligent applications such as data acquisition and manual interaction. The photovoltaic inverter can detect, record and upload all kinds of fault information about the power grid and photovoltaic system, such as high grid voltage, low grid voltage, high grid frequency, low grid frequency, unbalanced grid voltage, high DC voltage, overload of photovoltaic grid connected inverter, overheating of photovoltaic grid connected inverter, isolated island of photovoltaic grid connected inverter, DSP fault Communication failure, insulation failure, leakage protection, DC arcing protection, over standard voltage distortion protection, etc. can be recorded by the photovoltaic inverter and uploaded to the user's monitoring equipment.

Series inverters are mainly used in distributed photovoltaic power generation systems, including household, industrial and commercial roofs, photovoltaic poverty alleviation and other small and medium-sized power generation projects. Users have higher requirements for the intelligence of power generation systems. Inverters with more functions such as data collection, management and monitoring will become the main development trend; Photovoltaic inverter can also provide more diversified functional interfaces for photovoltaic power generation system, such as battery energy storage interface, which can use the energy storage system to store the excess electric energy produced by photovoltaic system and consume the energy of energy storage battery in case of power failure or peak electricity price.

The grid connected inverter with photovoltaic energy storage function can automatically optimize the power configuration according to the time period of peak and trough of power consumption. During the peak period of power consumption, the inverter will switch the photovoltaic power generation or battery power supply mode to supply power to users; In the period of low power consumption, the inverter will switch the mains power supply or the mains power to the charging mode of energy storage battery, so as to cut the peak and fill the valley and reduce the burden of power grid. Therefore, it is equivalent to increasing the user's income while optimizing the power allocation.