What are the differences between inverters?

Inverter is mainly used to convert direct current (DC) into alternating current (AC), and is widely used in photovoltaic power generation, wind power generation, household appliances and other fields. According to its application scenarios and technical characteristics, inverters can be divided into the following categories:

Classification by application field:

Photovoltaic inverter: used in solar photovoltaic systems to convert the direct current generated by solar panels into alternating current, supplying the power grid or directly using it.
Wind power inverter: used in wind power generation systems to convert the direct current generated by wind turbines into alternating current.
Household inverter: used in household appliances, such as UPS uninterruptible power supply, to convert the direct current of the battery into alternating current for household appliances.
Car inverter: used in cars to convert the direct current of the car battery into alternating current for car appliances.

Classification by output waveform:

Square wave inverter: the output alternating current is a square wave, which is low in cost, but is not friendly to some electrical equipment and is easy to cause damage.
Modified wave inverter: the output alternating current is a modified square wave, which is a certain improvement over the square wave inverter and has slightly better compatibility.
Pure sine wave inverter: The output AC power is pure sine wave, which is exactly the same as the mains power, with the best compatibility, but the cost is higher.

Classification by inverter structure:

Central inverter: The DC power of multiple photovoltaic modules is concentrated together and converted into AC power through a high-power inverter. It is suitable for large-scale photovoltaic power stations.
String inverter: Each group of photovoltaic modules has an independent inverter, which is more efficient and suitable for small and medium-sized photovoltaic power stations.
Micro inverter: Each photovoltaic module has an independent inverter to maximize the efficiency of each module, which is suitable for small-scale photovoltaic systems.

Classification by working mode:

Stand-alone inverter: used for off-grid systems, providing independent AC power, not relying on the power grid.
Grid-connected inverter: The generated AC power is connected to the power grid and works in coordination with the power grid.
Hybrid inverter: It can be operated independently or connected to the grid, and the conversion is carried out according to actual needs.
These different types of inverters are different in application scenarios, output quality, structure and working mode. The selection of a suitable inverter needs to be determined according to specific usage requirements and environmental conditions.

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