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Checking the voltage of the pump system
The maximum input voltage of the S1-200 controller is 55 V DC. The open circuit voltage (VOC) of your PV modules must not exceed the maximum input voltage of your controller (55 V DC). To find out the VOC value supplied by your modules, please refer to the module label.
If the voltage allowed by the controller is exceeded, the controller will be damaged.
More information can be found at the links below: