Huawei SUN2000L-2KTL Quick Manual page 21

4. Install DC input power cables.
1. Ensure that the PV module output is well insulated to ground.
2. Use the positive and negative Staubli MC4 metal terminals and DC connectors supplied with
the SUN2000. Using incompatible positive and negative metal terminals and DC connectors
may result in serious consequences. The caused device damage is not covered under warranty.
3. The DC input voltage of the SUN2000 shall not exceed the maximum input voltage under any
circumstance.
4. Before installing DC input power cables, label the cable polarities to ensure correct cable
connections.
5. If the polarities of the DC input power cables are reversed, do not operate the DC switch or the
positive/negative connector immediately. Failing to do so may cause device damage, which is
not covered under warranty. Wait until the night when solar irradiance declines and the PV
string current drops to below 0.5 A. Then set the DC switch to OFF, remove the positive and
negative connectors, and correct the polarities of the DC input power cables.
Assembling DC Connectors
Positive metal terminal
Negative metal terminal
Ensure that cable
polarities are correct.
Installing DC Input Power Cables
If the original DC input power cables are not long enough, add DC input extension cables.
DC input terminals
PV-CZM-22100/19100 (Staubli)
Ensure that the cables
cannot be pulled out
after being crimped.
Use the wrench
shown in the figure to
tighten the locking
nut. When the wrench
slips during the
tightening, the
locking nut has been
tightened.
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Positive connector
Negative
Click
connector
PV-MS-HZ open-
end wrench
(Staubli)