Residential Smart PV Solution Quick Guide (Three-Phase PV+ESS Scenario + Smart Dongle Networking)

Residential Smart PV Solution Quick Guide Issue: 09
(Three-Phase PV+ESS Scenario + Smart Dongle Networking) Date: 2025-07-25

Networking Product Overview
Smart Smart PV
1 Critical load 3 2 Inverter ESS Backup Box Smart Power Sensor
Dongle Optimizer

PV strings
(including optimizers) Slave inverter 2


Critical load 2


PV strings
(including optimizers) Slave inverter 1

Component Model Description

SUN2000-(5KTL-12KTL)-M1 SUN5000-(8KTL, 12KTL)-MAP0 • A maximum of three inverters can be cascaded.
SUN2000-(12K-25K)-MB0 series • M1/M2/M5/MB0 inverters can be cascaded.
series SUN5000-(17K, 25K)-MB0 • The SUN2000-(5K-12K)-MAP0 cannot be cascaded with other
Inverter SUN2000-(8KTL-20KTL)-M2 series inverters.
(master and SUN2000-(12KTL-25KTL)-M5 • SUN5000 inverters cannot be cascaded with SUN2000 inverters.
slave) series • Optimizers must be configured for all PV modules connected to
SUN2000-(5K-12K)-MAP0 a SUN5000 inverter. Otherwise, the inverter cannot be started.
Critical load 1
Common load series • In the Smart Dongle networking scenario, a maximum of three
inverters and six ESSs can be connected.

LUNA2000-(5-30)-S0 • If there is only one ESS, it must be connected to the master
PV strings Smart Power LUNA2000-S1 inverter.
Each M1/MAP0 can connect to a maximum of two ESSs, and
(including optimizers) Master inverter Sensor •
Energy each MB0 can connect to a maximum of four ESSs(each
storage battery terminal can connect to a maximum of two batteries).
system (ESS) • The LUNA2000-(5-30)-S0 and LUNA2000-S1 cannot connect to
АC power the same inverter in a parallel system.
distribution box Power grid • If inverters are cascaded, the LUNA2000-(5-30)-S0 and
LUNA2000-S1 cannot connect to different inverters.

Backup Box-B1 • AC input voltage range: grid-tied (three-phase) 342–440 V; off-
grid (single-phase) 220/230 V
Backup Box • If there is only one Backup Box, it must be connected to the
master inverter.
• Only M1 can be connected to the Backup Box-B1.
4G Smart Dongle
DTSU666-H
4G The Smart Power Sensor must be connected to the master
YDS60-C24 •
Smart Power inverter.
DTSU71
Sensor It connects to the inverter over RS485 for output power
DHSU1079-CT •
FusionSolar management and power limiting.
Ethernet SmartPVMS
WLAN-FE SDongleB-06 (4G) • The Smart Dongle must be connected to the master inverter.
Signal cable Smart Dongle Smart Dongle SDongleA-05 (WLAN-FE) • It connects to the management system and performs power
WLAN scheduling.
Power cable
For details about the optimizer supported by the inverter, see:
FE FusionSolar app
Smart PV • SUN2000 Smart PV Optimizer User Manual
Wireless communication
Optimizer • MERC-600W-PA0 Smart PV Optimizer User Manual
• MERC-(1300W, 1100W)-P Smart PV Optimizer User Manual

1. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure
accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind,
When MB0 functions as the master inverter and needs to connect to both a power meter and battery, if more than two batteries are connected,
express or implied.
select one of the following meter models: YDS60-C24, DTSU666-H 250A/50mA(20022249-003), DTSU71, and DHSU1079-CT. The DTSU666-
2. For details about the solution components, installation, and cable connections, see the corresponding user manuals and quick guides.
H(20022249) and DTSU666-H 250A/50mA(20022249-001) are not supported. Ensure that the baud rate for RS485-2 is negotiated to 115200 bit/s.
3. The cable colors involved in this document are for reference only. Select cables in accordance with local cable specifications.
For details about baud rate negotiation, see Baud Rate Negotiation.

1 Copyright © Huawei Digital Power Technologies Co., Ltd. 2025. All rights reserved.
Residential Smart PV Solution Quick Guide
(Three-Phase PV+ESS Scenario + Smart Dongle Networking)

3 Cable Connections (Three-Phase Inverter M1 + ESS S0 + Backup Box B1 + Smart Dongle)
Power grid
Before connecting cables, ensure PV strings (with optimizers) The wiring sequence of the Backup Box must be
that all switches are OFF. Otherwise, consistent with that of the inverter AC terminals.
electric shocks may occur. AC power
Backup Box distribution box

Backup load
Master inverter
Slave inverter 2 Slave inverter 1 power
distribution
box


PE

Common loads


Cable One End The Other End One End The Other End
No. Cable
Type No.
Component Port Port Component Type Component Port Port Component
PV1+ Positive terminal
AC-L1 X3-1 (L1)
Master inverter Negative PV strings
PV1-
terminal AC-L2 X3-3 (L2)
DC power BAT+ BAT+ Master inverter AC-L3 X3-5 (L3) Backup Box
cable Master inverter ESS 1
BAT- BAT- AC-N X3-8 (N)
PE BAT+ BAT+ AC-PE X3-12 (PE)
ESS 1 ESS 2
Connect other cables to slave inverters BAT- BAT-
Backup load L X1-1
by referring to the connection method COM-13 COM-2(right) power N X1-2 Backup Box
COM-11 COM-3(right) distribution box
for the master inverter. ESS 1 PE X1-4
COM-7 COM-4(right) L1 X2-1
COM-9 COM-7(right)
L2 X2-2
PE COM-1 COM-2 Slave AC power
PE AC L3 X2-3 Backup Box
Master inverter COM-3 COM-4 inverter 1 distribution box
Signal cables must be outdoor power N X2-4
COM-8 X4-1 cable
shielded twisted pair cables. Backup Box PE X2-6
COM-16 X4-2 L1 3
Signal
COM-9 25 AC power L2 6
cable DTSU666-H DTSU666-H
COM-7 24 distribution box L3 9
COM-2(left) COM-2 (right) N 10
COM-3(left) COM-3(right) 13
COM-4(left) COM-4(right) L1
ESS 1 ESS 2 14
COM-7(left) COM-7(right)
AC power 16 DTSU666-H
COM-8(left) COM-8(right) L2
distribution box 17 CT
COM-9(left) COM-9(right)
19
Slave COM-1 COM-2 Slave inverter L3
inverter 1 COM-3 COM-4 2 21

2
Residential Smart PV Solution Quick Guide
(Three-Phase PV+ESS Scenario + Smart Dongle Networking)

3 Cable Connections (Three-Phase Inverter M1 + ESS S1 + Backup Box B1 + Smart Dongle)

The wiring sequence of the Backup Box must be Power grid
Before connecting cables, ensure PV strings (with optimizers)
that all switches are OFF. Otherwise, consistent with that of the inverter AC terminals.
electric shocks may occur. AC power
Backup Box distribution box

Backup load
Slave inverter 2 Slave inverter 1 Master inverter power
distribution
box


PE


Common loads
Cable One End The Other End Cable One End The Other End
No. No.
Type Component Port Port Component Type Component Port Port Component
Positive
PV1+ AC-L1 X3-1 (L1)
Master terminal
PV strings
Connect other cables to slave inverters inverter Negative AC-L2 X3-3 (L2)
PV1-
by referring to the connection method DC terminal Master inverter AC-L3 X3-5 (L3) Backup Box
power
Master BAT+ BAT+ AC-N X3-8 (N)
for the master inverter. cable ESS 1
inverter BAT- BAT- AC-PE X3-12 (PE)
BAT+ BAT+
ESS 1 ESS 2 Backup load L X1-1
BAT- BAT-
power N X1-2 Backup Box
COM-13 COM-5
distribution box PE X1-4
Signal cables must be outdoor COM-11 COM-4
ESS 1 L1 X2-1
shielded twisted pair cables. COM-7 COM-2 AC
L2 X2-2
COM-9 COM-3 power
Router LAN Master AC power
cable L3 X2-3 Backup Box
inverter COM-8 X4-1 AC distribution box
Backup Box power N X2-4
COM-16 X4-2
Signal cable PE X2-6
cable COM-9 25
DTSU666-H L1 3
COM-7 24
AC power L2 6
COM-7 COM-7 DTSU666-H
distribution box L3 9
COM-8 COM-8
N 10
COM-9 COM-9
ESS 1 ESS 2 13
COM-10 COM-10 L1
COM-11 COM-11 14
COM-12 COM-12 AC power 16 DTSU666-H
L2
Slave COM-1 COM-2 Slave distribution box 17 CT
inverter 1 COM-3 COM-4 inverter 2 19
L3
21
3
Residential Smart PV Solution Quick Guide
(Three-Phase PV+ESS Scenario + Smart Dongle Networking)

3 Cable Connections (Three-Phase Inverter MB0 + ESS S0 + Smart Dongle)
Before connecting cables, ensure that all switches are OFF. Otherwise, electric shocks Signal cables must be outdoor Connect other cables to slave inverters by referring to the
may occur. shielded twisted pair cables. connection method for the master inverter.

PV strings
(with optimizers) Power grid

Slave inverter 2 Slave inverter 1 Master inverter AC power
distribution box


10


PE 11


9
One End The Other End
Cable Type No.
Component Port Port Component
PV1+ Positive terminal Loads
Master inverter PV strings
PV1- Negative terminal
BAT+ BAT+ Cable One End The Other End
PE DC power No.
Master inverter ESS 1 Type
PE cable BAT- BAT- Component Port Port Component
BAT+ BAT+ L1 L1
ESS 1 ESS 2
BAT- BAT-
L2 L2 AC power
COM-2(left) COM-2 (right) 9 Master inverter L3 L3 distribution
COM-3(left) COM-3(right) N N box
COM-4(left) COM-4(right) PE PE
PE ESS 1 ESS 2
PE COM-7(left) COM-7(right) L1 3
COM-8(left) COM-8(right)
AC power L2 6
COM-9(left) COM-9(right) AC DTSU666-H
power 10 distribution box L3 9
COM-9 COM-7 (right)
Signal cable
COM-7 COM-4 (right) N 10
cable Master inverter ESS 1
COM-13 COM-2 (right) 13
L1
COM-11 COM-3 (right) 14
COM-1 COM-2 Slave
Master inverter AC power 16 DTSU666-H
COM-3 COM-4 inverter 1 11 L2
distribution box 17 CT
Slave COM-1 COM-2 Slave
inverter 1 COM-3 COM-4 inverter 2 19
L3
COM-7 24 21
Master inverter DTSU666-H
COM-9 25

4
Residential Smart PV Solution Quick Guide
(Three-Phase PV+ESS Scenario + Smart Dongle Networking)

3 Cable Connections (Three-Phase Inverter MB0 + ESS S1 + Smart Dongle)
PV strings
(with optimizers)
Before connecting cables, ensure that Signal cables must be outdoor
all switches are OFF. Otherwise, shielded twisted pair cables.
electric shocks may occur.
Power grid

AC power
Slave inverter 2 Slave inverter 1 Master inverter
distribution box


10


PE 11


9 Loads
Connect other cables to
Cable One End The Other End
No.
slave inverters by referring Type Component Port Port Component
Positive
to the connection method PV1+
Master terminal
PV strings
for the master inverter. inverter Negative
PV1-
terminal Cable One End The Other End
DC power No.
Master BAT+ BAT+ Type Component Port Port Component
cable ESS 1
inverter BAT- BAT- L1 L1
BAT+ BAT+
L2 L2 AC power
ESS 1 ESS 2 Master
BAT- BAT- L3 L3 distribution
Router 9 inverter
COM-7 COM-7 N N box
LAN COM-8 COM-8 PE PE
COM-9 COM-9
ESS 1 ESS 2 L1 3
COM-10 COM-10
AC AC power L2 6
COM-11 COM-11 distribution DTSU666-H
power 10 L3 9
COM-12 COM-12 cable box
COM-9 COM-3 N 10
Signal
Master COM-7 COM-2 13
cable ESS 1 L1
inverter COM-13 COM-5 14
COM-11 COM-4 AC power
16 DTSU666-H
Master COM-1 COM-2 Slave distribution L2
11 CT
inverter COM-3 COM-4 inverter 1 box 17
Slave COM-1 COM-2 Slave 19
L3
inverter 1 COM-3 COM-4 inverter 2 21
Master COM-7 24
DTSU666-H
5 inverter COM-9 25
Residential Smart PV Solution Quick Guide
(Three-Phase PV+ESS Scenario + Smart Dongle Networking)

3 Cable Connections (Three-Phase Inverter MAP0 + ESS S0 + Smart Dongle)
PV strings (with optimizers)


Slave inverter 2 Slave inverter 1 Master inverter


10


11


9

The Other End

PE Cable One End The Other End
No.
Type Component Port Port Component Loads
Before connecting cables, Positive
PV1+
Master terminal
ensure that all switches are PV strings
inverter Negative
PV1- Cable One End The Other End
OFF. Otherwise, electric DC terminal No.
Type
shocks may occur. power Master BAT+ BAT+ Component Port Port Component
ESS 1
cable inverter BAT- BAT- L1 L1
PE PE
BAT+ BAT+ L2 L2 AC power
ESS 1 ESS 2
BAT- BAT- 9 Master inverter L3 L3 distribution
Connect other cables to COM-2 (left) COM-2 (right) N N box
slave inverters by referring COM-3 (left) COM-3 (right) PE PE
COM-4 (left) COM-4 (right) L1 3
to the connection method ESS 1 ESS 2
COM-7 (left) COM-7 (right) AC power L2 6
for the master inverter. AC DTSU666-H
COM-8 (left) COM-8 (right)
power 10 distribution box L3 9
COM-9 (left) COM-9 (right) cable N 10
COM-2
Signal 13
Signal cables must be COM: RJ45 COM-3 L1
cable Inverter 1 ESS 1 14
outdoor shielded twisted network port COM-4
AC power 16 DTSU666-H
COM-7 L2
11 distribution box CT
pair cables. Master COM-1 COM-1 Slave 17
inverter COM-3 COM-3 inverter 1 19
L3
Slave COM-1 COM-1 Slave 21
inverter 1 COM-3 COM-3 inverter 2
Master COM-7 24
DTSU666-H
6 inverter COM-9 25
Residential Smart PV Solution Quick Guide
(Three-Phase PV+ESS Scenario + Smart Dongle Networking)

3 Cable Connections (Three-Phase Inverter MAP0 + ESS S1 + Smart Dongle)
PV strings (with optimizers)

Before connecting cables,
ensure that all switches are
Slave inverter 2 Slave inverter 1 Master inverter
OFF. Otherwise, electric
shocks may occur.

Connect other cables to
slave inverters by referring
to the connection method
for the master inverter.
10
Signal cables must be
outdoor shielded twisted
pair cables.


11


9
Cable One End The Other End The Other End
No.
Type Component Port Port Component
Positive
PV1+
Master terminal
PV strings
inverter Negative Loads
PV1-
terminal
DC power
Master BAT+ BAT+
cable ESS 1
inverter BAT- BAT-
Cable One End The Other End
BAT+ BAT+ No.
ESS 1 ESS 2 Type Component Port Port Component
BAT- BAT-
L1 L1
COM-7 COM-7
L2 L2
COM-8 COM-8 AC power
Master inverter L3 L3 distribution
COM-9 COM-9 9
ESS 1 ESS 2 N N box
COM-10 COM-10
PE PE
COM-11 COM-11
L1 3
COM-12 COM-12
Router AC power L2 6
COM-3 AC DTSU666-H
Signal distribution box
COM: RJ45 COM-2 power 10 L3 9
cable Inverter 1 ESS 1 LAN
network port COM-5 cable N 10
COM-4 13
L1
Master COM-1 COM-1 Slave 14
inverter COM-3 COM-3 inverter 1
AC power 16 DTSU666-H
Slave COM-1 COM-1 Slave 11 L2
inverter 1 COM-3 COM-3 inverter 2 distribution box 17 CT
Master COM-11 24 19
DTSU666-H L3
inverter COM-13 25 21
7
Residential Smart PV Solution Quick Guide
(Three-Phase PV+ESS Scenario + Smart Dongle Networking)

4 System Commissioning

App-based Deployment Procedure Downloading and Installing the Commissioning Instructions
FusionSolar App
• Search for FusionSolar in the app store to For details about installer registration, setup wizard, and common
Download and install the FusionSolar app download the app. parameter settings, see the FusionSolar App Quick Guide (Smart
• Scan the QR code below to download the app.
Dongle Networking & Inverter Direct Connection).
Sign up as an installer (optional, required
for initial registration)

Enter the setup wizard
扫码获取指导
FusionSolar
Scan for instructions
Check the device status


8