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How to improve the service life of the solar inverter?

How to improve the service life of the solar inverter?

August 25,2021.
Photovoltaic inverters are electronic products, limited by internal electronic components, they must have a certain life span. The life of the inverter is determined by the quality of the product, the installation and use environment, and subsequent operation and maintenance. So how to improve the service life of the inverter through correct installation, use and later operation and maintenance?

The main factors affecting the service life of the inverter are: 1. The internal temperature of the inverter 2. The input voltage and current parameters of the inverter; 3. The external environment in which the inverter runs.

1. The temperature inside the inverter is the most important factor affecting the life of the inverter. Excessive temperature will reduce the performance and life of the components. The internal capacitor of the inverter is a key factor affecting the life of the inverter. There is one of the simplest basic principles: the rule of ten degrees, that is, for every 10 degree decrease in the ambient temperature, the life of the capacitor doubles; every 10 degree increase in the ambient temperature, the life of the capacitor is shortened by half.
In order to ensure the stability of the internal temperature of the inverter, in addition to product design considerations, special attention should be paid to the following items in installation and use:

(1) The inverter must be installed in a ventilated space and maintain good ventilation with the outside world.
(2) The installation position of the inverter should be avoided as far as possible from direct sunlight. If the inverter is installed outdoors, it is best to install it under the eaves on the sun-back side or under the solar modules, and the eaves or components above the inverter will block it. If it can only be installed in an open place, it is recommended to install a sunshade canopy above the inverter.

(3) Whether it is a single installation or multiple installations of the inverter, it must be installed in accordance with the installation space size given by the inverter manufacturer to ensure that the inverter has sufficient ventilation and heat dissipation space and operation space for later operation and maintenance.
(4) The installation location of the inverter should be as far away as possible from high-temperature areas such as boilers, oil-fired hot air blowers, heating pipes, and air outlets of external units of air conditioners.

2. Input voltage and current parameters of the inverter

Improper matching of the inverter's input voltage and current parameters will also affect the life of the inverter.
The external environment in which the converter is running

3. The external environment in which the inverter operates is also an important factor affecting the life of the inverter.
At present, the protection level of string inverters on the market can reach IP65 or even IP66. It is dustproof, rainproof, and has salt spray corrosion resistance. It can adapt to harsh external environments, but in places with serious pollution or dust In more places, because dirt falls on the radiator, it will affect the function of the radiator. Dust, leaves, mud and other fine objects may also enter the air duct of the inverter, which will also affect the heat dissipation and affect the service life. In this case, it is particularly important to clean up the dirt on the inverter or the cooling fan on a regular basis, so that the inverter has good heat dissipation conditions.

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