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The advantages and disadvantages of different photovoltaic inverters and the scope of application

Mar 31, 2021

The advantages and disadvantages of different photovoltaic inverters and the scope of application

In the photovoltaic industry, the inverter is one of the few relatively independent accessories, and it is also the only device with intelligence, which is of great significance to the overall power generation efficiency.

Photovoltaic inverters are mainly divided into centralized inverters, string inverters and micro inverters.

Centralized inverter. Advantages: mature technology, small number of inverters and components, few failure points and high reliability. Disadvantages: The total power is greatly affected by individual solar cells, and a larger space is required to arrange the inverter, the later maintenance is more complicated, and the total cost is higher.

Scope of application: Generally used in large-scale power generation systems such as desert power stations and ground power stations.

String inverter. Advantages: The inverter is small in size, light in weight, easy to install, and can maximize power generation. Disadvantages: There are many inverters, many electronic components, and the total failure rate is relatively high.

Scope of application: suitable for small-scale centralized power stations, rooftop photovoltaic systems, etc.

Micro inverter. Advantages: installation is simple, safe, and can maximize power generation. Disadvantages: the price is higher and the scope of application is small.

Scope of application: distributed household rooftop power stations.

Judging from the current market situation, the market share of micro-inverters is small, and centralized inverters are the first choice in the early stage of photovoltaic development. Due to inconvenient installation and high total cost constraints, the growth rate is not as good as before. String inverters are favored by users due to their low price and convenient installation, and their market share continues to increase. In just a few years, Huawei, which has become the world's largest manufacturer of photovoltaic inverters, has its main product is string inverters.

According to statistics, the market share of string inverters in 2019 was 42%, and it is expected to increase to 48% by 2025.