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1. Before connecting DC input power cables, ensure that the original DC terminals have been
cut off. If the original DC connector is directly connected to the SUN2000-(15KTL-50KTL)-M3
series, the inverter may be burnt.
2. Use the positive and negative Staubli MC4 metal terminals and DC connectors delivered 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. You are advised to use the PV-CZM-22100 (Staubli) crimping tool and do not use it with the
positioning block. Otherwise, the metal terminals may be damaged. The PV-MS (Staubli) or
PV-MS-HZ (Staubli) open-end wrench is recommended.
4. Ensure that the PV module output is well insulated to ground.
5. The DC input voltage of the SUN2000-29.9KTL/30KTL/36KTL/42KTL/50KTL-M3 and
SUN2000-43KTL-INM3 shall not exceed 1100 V DC under any circumstance.
6. The DC input voltage of the SUN2000-33KTL/36KTL/40KTL-NAM3 shall not exceed 1000 V
DC under any circumstance.
7. Before installing DC input power cables, label the cable polarities to ensure correct cable
connections.
8. If a DC input power cable is reversely connected and the DC switch is turned on, do not
perform operations on the DC switch or the positive/negative connectors immediately.
Otherwise, the device may be damaged. The caused device damage is not covered under any
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 the OFF position, remove the positive and negative
connectors, and correct the polarity of the DC input power cable.
2. Connect the DC power cables.
Positive metal
terminal
Negative
metal terminal
PV-CZM-22100
Ensure that the cables
cannot be pulled out
after being crimped.
Click
Positive connector
Negative
Click
connector
Ensure that
cable polarities
are correct.
44
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.
PV-MS-HZ
Open-end
wrench
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