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Huawei SUN2000-100KTL-M2 Quick Manual page 15

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Installing DC Input Power Cables
1. Use the positive and negative Amphenol Helios H4 metal contacts and DC connectors
supplied with the solar inverter. Using incompatible positive and negative metal contacts and
DC connectors may result in serious consequences. The caused device damage is not covered
under any warranty.
2. Before connecting the DC input power cables, label the cable polarities to ensure correct
cable connections. Otherwise, the solar inverter may be damaged.
3. Measure the voltage at the DC input end using a multimeter set to the DC position. If the
voltage is a negative value, the DC input polarity is incorrect. Correct the polarity. If the
voltage is greater than 1100 V, too many PV modules are configured to the same string.
Remove some PV modules.
4. If the DC input power cable is reversely connected and the DC switches are set to ON, do not
perform any operation on the switches or the positive and negative connectors. Otherwise,
the device may be damaged. The caused device damage is not covered under any warranty.
Wait until the solar irradiance weakens at night and the PV string current decreases below 0.5
A. Set the three DC switches to OFF, and correct the connection of positive and negative
connectors.
5. Connect the PV string connector to the inverter connector, and then pull back the PV string
connector along the axial direction to check whether the connectors are securely connected.
6. The connector must be securely connected. Damages caused by improper connection are not
covered under the warranty.
Positive metal contact
Negative metal contact
Click
H4TC0003 (Amphenol)
Ensure that the cable
cannot be pulled out
after being crimped.
Use a multimeter set
to the DC position to
measure the DC
voltage. (DC voltage:
≤ 1100 V)
14
Positive connector
Negative
Click
connector
Ensure that the
locking nut is
secured.
H4TW0001
(Amphenol)

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