Huawei SUN2000-100KTL-M2 Quick Manual page 14

4.7 Installing DC Input Power Cables
Selecting DC Input Terminals
Before connecting the PV string to the inverter, check that the PV string output is well insulated
to the ground. Use an insulation resistance tester to add a voltage of 1500 V between the PV–
cable and the ground, and then check that the resistance value is greater than or equal to 1 MΩ.
If the value is less than 1 MΩ, troubleshoot the cable insulation.
When the DC inputs are not fully configured, the DC input terminals must meet the following
requirements:
1. Evenly distribute the DC input power cables on the DC input terminals controlled by the three
DC switches. DC SWITCH 1 is preferred.
2. The even-numbered PV terminals are preferred to maximize the connections of MPPTs.
3. If the number of PV inputs is 11 to 19, connect cables to the odd-numbered PV terminals
from PV1 and PV19, and avoid connections to adjacent MPPTs if possible.
If the number of PV inputs is 11 to 19, the DC input terminals are selected as follows.
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