Introduction to the difference between solar off-grid inverter and on-grid inverter

In the AC photovoltaic power generation system, the inverter is an indispensable part. At present, due to various technical or policy reasons, it will take a long time to connect all independent photovoltaic AC power generation systems to the national unified power grid. Therefore, the market divides photovoltaic inverters into two categories: photovoltaic off-grid inverters and photovoltaic grid-connected inverters. [Shenzhen Huayite New Energy Technology] Professional off-grid solar inverter manufacturer, adapting to development needs, provides customers with the best off-grid inverters and sine wave power frequency inverters!

There is no big difference in the main circuit structure between photovoltaic off-grid inverters and photovoltaic grid-connected inverters. The main difference is that photovoltaic grid-connected inverters need to consider the safety of operation with the grid after grid connection. That is, the same frequency; the same phase; the ability to control special situations such as anti-islanding. Photovoltaic off-grid inverters do not need to consider these factors.

Word explanation

Same frequency and same phase:

Island effect: When the power supply of the power grid is interrupted due to special factors, and the photovoltaic power generation systems connected to the grid are still running and continue to supply power to the grid and loads, this phenomenon is called island effect.

The photovoltaic off-grid inverter has the same requirements as the photovoltaic grid-connected inverter in terms of inverter efficiency, reliability, and wide adaptability of the DC input voltage. In medium and large-capacity photovoltaic power generation systems, the output of the inverter power supply should be a sine wave with low distortion.

HET POWER’s photovoltaic off-grid inverter has complete specifications. With the advent of low-carbon life, the use of new energy has received more and more attention, and the solar photovoltaic power generation system has developed rapidly. The market for photovoltaic off-grid inverters will also become more and more broad.