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step 2 Check the cable connection of the PV string for polarity correctness and ensure that the
open circuit voltage in any case does not exceed the inverter input limit of 1,000V.
The multimeter must have a DC voltage range of at least 1,000 V. If the voltage is a
negative value, the DC input polarity is incorrect. Please correct the DC input polar-
ity. If the voltage is greater than 1,000 V, too many PV modules are configured to
the same string. Please remove some PV modules.
step 3 Connect the PV connectors to corresponding terminals until there is an audible click.
step 4 Follow the foregoing steps to connect PV connectors of other PV strings.
step 5 Seal any unused PV terminal with a terminal cap.
SUNGROW inverters cannot be used with third-party optimizers.
If the PV string is equipped with the optimizer, please refer to the optimizer manual for elec-
trical connections and make sure that the polarity of the optimizer cables is correct.
- - End
6 Electrical Connection User Manual
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