Huawei SUN2000-20KTL-M3 User Manual

2. Maximize the number of connected MPPT circuits.
Quantity
of PV
Strings
Terminal Selection Quantity
of PV
Strings
Terminal Selection
1 PV1 2 PV1, PV7
3 PV1, PV3, PV7 4 PV1, PV3, PV5, PV7
5 PV1, PV2, PV3, PV5, PV7 6 PV1, PV2, PV3, PV5, PV7,
PV8
7 PV1, PV2, PV3, PV4, PV5,
PV7, PV8
8 PV1, PV2, PV3, PV4, PV5,
PV6, PV7, PV8
5.5.2 Connecting Cables to Amphenol Helios H4 Terminals
CA UTION
Use the Amphenol Helios H4 positive and negative metal terminals and DC
connectors delivered with the inverter. Using incompatible positive and negative
metal terminals and DC connectors may result in serious consequences. The
resulting device damage is not covered by the product warranty.
NO TICE
● You are advised to use the H4TC0003 (Amphenol) crimping tool and do not use
it with the positioning block. Otherwise, the metal terminals may be damaged.
● The H4TW0001 (Amphenol) open-end wrench is recommended.
● Cables with high rigidity, such as armored cables, are not recommended as DC
input power cables, because poor contact may be caused by the bending of the
cables.
● Before assembling DC connectors, label the cable polarities correctly to ensure
correct cable connections.
● After the positive and negative connectors snap into place, try to pull the DC
input power cables back to check that they are secure.
● If the inverter is used with optimizers, the number of optimizers in a single PV
string cannot exceed 25.
● If PV strings are congured with optimizers, check the cable polarities by
referring to the
Smart PV Optimizer Quick Guide .
Procedure
Step 1 Connect DC power cables.
SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-
M3
User Manual 5 Electrical Connections
Issue 18 (2024-03-10) Copyright © Huawei Technologies Co., Ltd. 50

Huawei SUN2000-20KTL-M3 Specifications

General

Brand	Huawei
Model	SUN2000-20KTL-M3
Category	Inverter
Language	English