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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
• After the PV string is connected to the input terminal on the inverter, please turn
on the corresponding DC switch.
• Only when the DC switch is set to "NO", the DC Type II is able to provide effec-
tive protection against electrical surges.
5.8 Communication Junction Box
Remove the Junction Box
Pull out the pin and keep it properly, remove the junction box.
The pin removed is a required accessory for fixing the junction box. Store it prop-
erly and protect it against missing or deformation.
Install the Junction Box
Remount the wiring box and press it tightly, insert the pin, and secure the wiring box with the
supplied M4×25 screw.
5 Electrical Connection User Manual
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