The photovoltaic inverter is composed of structural parts, circuit boards, power switches, capacitors, liquid crystal display screens and fans. If there is no special requirement for the series inverter, it is generally designed according to the life of 15 years. The actual service life is related to the design, materials and installation environment of the inverter, which is generally 8 to 15 years.
(1) The electrolytic capacitor is indeed one of the most vulnerable components of the inverter to failure. NCC capacitors are currently one of the best capacitors, and its capacitance specification clearly states: "Please note that the calculated results are not guaranteed values. When designing the life of the equipment, please review the capacitors with the life margin. In addition, if the calculated life is more than 15 years, please use the maximum of 15 years."
(2) In addition to electrolytic capacitors, there are many components with a life of less than 25 years, such as LCD screens, connectors, cables, terminal terminals, thermal silicone grease, etc.
Air conditioners, refrigerators, TV and other household appliances are civil products, the service life is about 8 years, the whole machine quality warranty is generally 1 year, and the photovoltaic inverter is industrial products, the service life is 15 years, taking into account the particularity of the inverter, only the manufacturer can repair, so most manufacturers use a five-year warranty.
Why few manufacturers have 10 years of warranty, because the photovoltaic inverter is a new thing, in addition to the domestic solar power, there is no manufacturer has 10 years of product operation experience, the life of the enterprise is not 10 years, but let the product quality guarantee for 10 years, unbelievable.
Inverter relative to TV and other home appliances, technology is not very mature, and it is high temperature, high voltage and large current, 10 years of warranty, not simply shout a slogan can be, need to increase a lot of costs, such as inverter needs more reduction design, after-sales service personnel also need to increase a lot, service costs will be very high.
