Advantages and disadvantages of string inverter

The advantages of string inverter

1.Modular design, its advantage is not affected by the difference between modules, effects of shade, while reducing the best working point of photovoltaic battery and solar system inverter components do not match the situation, increase the maximum generating capacity.
2.In the rainy day, foggy area, can generate power for a long time.
3.String inverter with small volume and light weight, convenient handling and installation, do not need specialized tools and equipment, also do not need a special distribution room, can simplify the construction, reduce the area, DC line connection does not need DC bus box and DC power distribution cabinet.
4.Low power consumption, low impact of failure, convenient replacement and maintenance.
5.Multi path MPPT tracking, reduce the impact of the block and the direction, and when a fault occurs, does not affect the power generation, high reliability.

Disadvantages of string inverter

1.More electronic components, power devices and signal circuits on the same board, difficult to design and manufacture.
2.The electric power device of small gap, not suitable for high altitude area.
3.Outdoor installation, is very easy to cause the shell and heat sink aging exposed to the weather.
4.When a plurality of solar energy inverters in parallel, total harmonic is high, THDI of single inverter can control to more than 2%, but if more than 40 sets of inverter in parallel, total harmonic superposition and difficult to suppress.

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