Huawei SDongleA-01 User Manual page 21

FusionSolar Smart PV Management System
Connection
User Manual (Inverters + SDongleA)
Table 2-9 Number of cascaded inverters
Limit
Maximum Number of Devices
That Can Be Connected to the
abcd
Smart Dongle
10
Note a: You can view the number of devices that can be connected to the Smart Dongle from the
label on the external package.
Note b: If the number of inverters exceeds the limit, configure multiple Smart Dongles. The
installation and commissioning for each Smart Dongle are the same.
Note c: If cascaded inverters include a single-phase inverter or are connected to batteries, a
maximum of three inverters can be cascaded.
Note d: If RS485 communication is used and the device is connected to the RS485-2 and RS485_2
ports, or 485B2 and 485A2 ports on the master inverter, the device is not counted as a cascaded
device.
Table 2-10 Device description
Device
PV module
Inverter Master
inverter
Issue 02 (2021-11-25)
NO TE
● The components in the dotted box are optional.
● The inverter model is subject to change. The model information and device appearance
in this document are for reference only.
● In the networking, the inverter where the Dongle is installed is the master inverter, and
other inverters are slave inverters. Slave inverters can communicate with the Dongle
through cascading.
● When multiple inverters are cascaded, only one Smart Dongle or SmartLogger can be
connected to the RS485 communications link.
● The Smart Power Sensor connects to the RS485-2 and RS485_2 ports, or 485B2 and
485A2 ports on the master inverter. The RS485-1 and RS485_1 ports, or 485B1 and
485A1 ports are used for inverter cascading.
Actual Connection
Number of Slave Inverters
n ≤ 9
Description
Purchased by the customer
● SUN2000-(2KTL-6KTL)-L1. Software version: SUN2000L
V200R001C00 or later. (all software versions of this
inverter model are supported.)
● SUN2000-(3KTL-20KTL)-M0
● SUN2000-(3KTL-12KTL)-M1
● SUN2000-(8KTL-20KTL)-M2
● SUN2000-(20KTL-40KTL)-M3
Copyright © Huawei Technologies Co., Ltd.
2 Introduction to the Solution
Number of Other Devices
(Such as Power Meters)
≤ 9 – n
Service
Owner
Device
supplier
Huawei
15