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Electrical Connection
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Figure 7-36 Tightening swivel nuts of PV connectors
Step 3: Check whether the PV connectors have the correct polarity. Use a multimeter to
measure the positive and negative voltage of the assembled PV connectors. Make
sure the open circuit voltage does not exceed the input limit of 950 V.
Figure 7-37 Measuring the voltage of PV connectors
NOTICE!
• If the voltage is a negative value, the DC input polarity is incorrect. You need to
correct the positive and negative polarity.
• If the measured voltage exceeds 950 V, too many PV modules are configured to the
same string. Remove some PV modules.
Step 4: Remove the PV dustproof cover. Seal the unused PV ports with original PV
dustproof cover.
PV dustproof cover
Figure 7-38 Removing the dustproof cover
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