Sungrow SH3K6 - Page 55

User Manual 6 Electrical Connection
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The inverter will not function properly if any PV polarity is reversed.
If the PV connectors are not assembled into place, it may cause an arc
or overheat. The loss caused by this issue will void the warranty.
3. (Optional) Install the copper for the parallel mode.
4. Plug the connectors into corresponding terminals.
5. Seal unused DC terminals with the terminal caps.