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10
1. Use the Amphenol Helios H4 PV connectors provided with the SUN2000. If the terminals
are lost or damaged, purchase the PV connectors of the same model. The device damaged
caused by incompatible PV connectors is not covered under any warranty or service
agreement.
2. Before connecting DC input power cables, label the cable polarities to ensure correct cable
connections. If the cables are connected incorrectly, the SUN2000 may be damaged.
3. Crimp the metal contacts using crimping tool H4TC0003 (Amphenol, recommended) or
H4TC0002 (Amphenol).
4. Insert the crimped metal terminals of the positive and negative power cables into the
appropriate positive and negative connectors. Then pull the DC input power cables to
ensure that they are connected securely.
5. Connect the positive and negative connectors to the appropriate positive and negative DC
input terminals. Then pull the DC input power cables to ensure that they are connected
securely.
6. If polarity of the DC input power cable is reversed and the DC switch is ON, do not turn off
the DC switch immediately or unplug positive and negative connectors. The device may be
damaged if you do not follow the instruction. The caused equipment damage is beyond the
warranty scope. Wait until the solar irradiance declines and the PV string current reduces to
below 0.5 A, and then turn off the two DC switches and remove the positive and negative
connectors. Correct the string polarity before reconnecting the string to the SUN2000.
• The DC voltage measurement range of the multimeter must be at least 1100 V.
• If the voltage is a negative value, the DC input polarity is incorrect. Correct the polarity.
• If the voltage is greater than 1100 V DC, too many PV modules are configured to the same
string. Remove some PV modules.
Positive metal contact
Negative metal contact
Recommended: PV cable
that meets the 1100 V
standard.
H4TC0003
(Amphenol)
Ensure that the cable
cannot be removed
after crimped.
Positive connector
Negative
connector
Click
Ensure that
the locking
nut is
secured.
H4TW0001
(Amphenol)
Use a multimeter
to measure the
DC voltage.
Click
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