Photovoltaic inverters generally have a life span of 25 years and are required to maintain their power stations during use. The life of the photovoltaic inverter depends on the life of the most valuable component, mainly the photovoltaic inverter. In the distributed photovoltaic power station, the main use of the series inverter. The following photovoltaic inverter manufacturers will introduce in detail what factors affect the life of PV inverter.
Photovoltaic inverter is composed of structural parts, circuit boards, power switches, capacitors, LCD panels and fans. Among them, the life of photovoltaic inverters is determined by the shortest life parts.
The electrolytic capacitor is indeed one of the most vulnerable components of the photovoltaic inverter. The electrolyte may evaporate and dry over time, resulting in the increase of the equivalent series impedance of the electrolytic capacitor. In the case of the same current, the higher ESR will lead to the heat of the capacitance, thus further aggravating the evaporation of the electrolyte, forming a bad form of evaporation. The sexual cycle eventually leads to the failure of the device.
The equivalent series impedance increases. In the case of the same current, the higher ESR leads to the heating of the capacitor, thus further intensifying the evaporation of the electrolyte and forming a vicious cycle, which eventually leads to the failure of the device.
Of course, the life of PV inverters is not only affected by components, but also many factors: natural factors, human factors, maintenance and so on.