● Ensure that the baud rates of the DDSU666-H and YDS70-C16 meters are set to
the default values. If they are changed, meters may go oine, generate alarms, or
aect the inverter output power.
● The preceding networking uses DDSU666-H as an example. Cable connections for
other meter models may vary.
● In cascading scenarios, the inverters are required to connect to the management
system through a Smart Dongle.
● In the preceding networking, the SUN2000s are cascaded and support the grid-tied
point control function to achieve zero export.
● If the SUN2000s requires the grid-tied point control function, they need to be
connected to a smart power sensor.
● A single-phase power meter is recommended for the networking with only single-
phase inverters.
● If the SUN2000-(2KTL-6KTL)-L1 are cascaded with three-phase inverters, they must
be connected to the grid in the same phase.
● Only one LG battery is supported, and the LG battery must be connected to the
inverter equipped with the Smart Dongle.
● LG batteries cannot be connected in cascading scenarios.
Procedure
Step 1 Connect signal cables to corresponding signal connectors.
● Ensure that the protection layer of the cable is in the connector. The surplus
core should be cut
o from the protection layer.
● Ensure that the exposed core is totally inserted into the cable hole.
● Ensure that the signal cables are connected securely.
● Ensure that the cables are not twisted.
● If multiple signal cables need to be connected to a single connector, ensure
that the outer diameters of the signal cables are the same.
Figure 5-23 Crimping two signal cables
SUN2000-(2KTL-6KTL)-L1
User Manual 5 Electrical Connection
Issue 10 (2023-02-13) Copyright © Huawei Technologies Co., Ltd. 62
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