Aside from the operating voltage range, another main parameter is the start-up voltage. It is the lowest acceptable voltage that is needed for the inverter to kick on. Each inverter has a minimum input voltage value that cannot trigger the inverter to operate if the PV voltage is lower than what is listed in the specification sheet.
However, they are designed to allow lower voltage once they are in “ON” mode, and that is what we mean by the minimum operating voltage range. As power is processed and converted from one shape to another, the solar inverters are expected to perform these tasks with the highest possible efficiency.
Although the inverter can be damaged if the maximum input voltage is exceeded, exceeding the maximum MPP voltage is, by contrast, nonhazardous. Similar to the case of the minimum input voltage not being reached, the operating point of the PV array shifts itself in relation to the MPP, resulting in a lower loss in yield.
Both the maximum voltage value and operating voltage range of an inverter are two main parameters that should be taken into account when stringing the inverter and PV array. PV designers should choose the PV array maximum voltage in order not to exceed the maximum input voltage of the inverter.
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