The system’s maximum operating voltage refers to the highest voltage at which your solar system array should operate. When connecting an inverter or controller to your array, this metric becomes essential. In simpler words, the maximum system voltage of your solar panels should be compatible with the capacity of your solar inverter or controller.

The system’s maximum operating voltage from solar panels can be detrimental, causing damage to the system and preventing it from functioning properly. This happens because the inverter is prone to failure or shutdown when the system voltage exceeds its maximum capacity.

How to Calculate Maximum PV System Voltage

The maximum voltage for a DC photovoltaic (PV) system is determined by adding the open-circuit voltage of the PV modules, adjusted for the coldest temperature expected. The correction factor is to be applied to the rated open-circuit voltage of both crystalline and multicrystalline silicon modules.

The voltage provided will serve as a crucial factor in establishing the voltage rating for cables, disconnects, overcurrent devices, and various other equipment. If the temperature is expected to be lower than -40°C (-40°F) or if PV modules made of materials other than crystalline or multi-crystalline silicon are used, follow the manufacturer’s instructions to adjust the system voltage.

Here is a table for correction factors for voltage in crystalline and multi-crystalline silicon modules.

Ambient Temperature (°C)FactorAmbient Temperature (°F)
24 to 201.0276 to 68
19 to 151.0467 to 59
14 to 101.0658 to 50
9 to 51.0849 to 41
4 to 01.1040 to 32
-1 to -51.1231 to 23
-6 to -101.1422 to 14
-11 to -151.1613 to 5
-16 to -201.184 to -4
-21 to -251.20-5 to -13
-26 to -301.21-14 to -22
-31 to -351.23-23 to -31
-36 to -401.25-32 to -40

Also SeeHigh Voltage Vs Low Voltage Solar Panels: Which is Better?

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Elliot is a passionate environmentalist and blogger who has dedicated his life to spreading awareness about conservation, green energy, and renewable energy. With a background in environmental science, he has a deep understanding of the issues facing our planet and is committed to educating others on how they can make a difference.

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