Shanxi household uses inferior inverter, causing rooftop photovoltaic power station to catch fire-EEWORLD

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May 4th news, in recent years, my country's photovoltaic power generation industry has flourished, especially the promotion of photovoltaic poverty alleviation, so that every household has installed photovoltaic panels on the roof. However, yesterday, the reporter learned that the inverter of a household photovoltaic power station in Shanxi caught fire! It caused an uproar in the industry. It is understood that the cause of the fire was the use of inferior inverters, which caused DC arcing and eventually led to the spontaneous combustion of internal components.

According to the staff, since May, the temperature has been rising day by day, and summer is getting closer and closer. As we all know, photovoltaic modules are very afraid of heat! Generally, the peak power temperature coefficient of photovoltaic modules is between -0.38~-0.44%/℃. For every 1℃ increase in temperature, the output power of photovoltaic modules will decrease by 0.38~0.44%, which not only affects the power generation, but also easily induces fire.

European, American and Japanese countries have strict regulations on the safety of inverters and combiner boxes. China is a major country in the world in assembling photovoltaic inverters, and it is not that it is incapable of producing high-quality products. In fact, low-quality domestic products and high-quality export products may coexist in the same factory.

Downstream customers, namely power station owners, are greedy for bargains and have pushed down the price per watt of inverters too much. Enterprises have no choice but to do so. They do not have more room for cost manipulation on modules and can only calculate some costs on devices. This practice of replacing one thing with another seems to have become an unspoken rule in the inverter industry.

This cost gap naturally leads to a quality gap. The bad consequences of inferior inverters include degraded inductor performance, unstable capacitors, brittle and deteriorated plastic components, shortened lifespans, degraded component insulation performance, degraded heat dissipation performance, and semiconductor component failure.

Reference address：Shanxi household uses inferior inverter, causing rooftop photovoltaic power station to catch fire

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