Sunways STM Series User manual

anual carefully and get familiar with the features, functions and safety notes.
please read through this m-

STM does not have
this indicator
STM does not have
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does not have this port
does not have this port
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SUNWAYS TECHNOLOGIES CO., LTD.
EN
STM/STK/STK-Pro
Application Scenarios and
Wiring Connection

CONTENTS

CONTENTS
1 STM/K-xxDxx-1 …………………………………………… 5
1.1 Communications Port ……………………………………………………………5
1.2 Application Scenarios and Wiring Connection ……………………………… 5
2 STM/K-xxDxx-2 …………………………………………… 7
2.1 Communications Port ……………………………………………………………7
2.2 Application Scenarios and Wiring Connection ……………………………… 7
3 STM/K-xxDxx-3 …………………………………………… 12
3.1 Communications Port ………………………………………………………… 12
3.2 Application Scenarios and Wiring Connection …………………………… 12

4
Attention
The products, services or features purchased are subject to the commercial contracts
and terms of Sunways technologies Co., Ltd. All or part of the products, services or
features described in this document may not be within purchased. Unless otherwise
agreed in the contract, the Company shall not make any express or implied declara-
tion or guarantee of the contents of this document.
Due to product version upgrades or other reasons, the contents of this document will
be updated periodically. Unless otherwise agreed, this document serves only as a
guide to use, and all statements, information and recommendations in this document
do not constitute any express or implied guarantee.

5
1 STM/K-xxDxx-1
Port Function Remark
1 Connect to L
4 Connect to N
5 Connect to CT1-S1 of L
6 Connect to CT1-S2 of L
RS485-1 RS485 port 1
RS485-2 RS485 port 2
LAN LAN communication port STM does not have this port
ANT WIFI antenna port STM does not have this port
Type-C Speci󽗉ed Debug Interface
Product functions are under continuous development, please contact Sunways for more
scenario solutions.
※ 1.1 Communications Port
※ 1.2 Application Scenarios and Wiring Connection

6
③ Applicable grid mode：Single-phase system，L+N，110/120/127(L-N)，220/230/240V(L-N).
According to di󽗈erent design requirements, it is recommended to add fuses or circuit breakers to the
voltage input terminals to meet the safety requirements of relevant electrical codes.
N
ULUNI*I
Fuses/Breaker
S1 S2
*
L
L
RS485-1
Inverter
P1(House) P2(Grid)
L
1 2 3 4 5 6 7 8 9 10 A B
Single-phase Inverter
L
N
Grid
Load
STK-xxDxx-1
WIFI/LAN
Grid Meter
RS485
Fuses/Breaker
CT-1
Server
1.2.1 Scenario 1-1 (STK)
① Description：In single-phase system, export limitation and 24 hours energy consumption monitor-
ing can be realized.
② System con󽗉guration： 1 x Sunways Single-Phase inverter, 1 x STK-xxDxx-1.

7
Grid
The communication wiring diagram of STK and single-phase grid-connected inverter (STS-1-3KTL/
STS-3-6KTL(-P)/STS-7-11KTL) is as follows:
1 1
1
3
5
2 2
3 3
2
4
6
Port 1 Port 2
Port 3

8
2 STM/K-xxDxx-2
※ 2.1 Communication Port
Port Function Remark
1 Connect to L1
2 Connect to L2
4 Connect to N
5 Connect to CT1-S1 of L1
6 Connect to CT1-S2 of L1
7 Connect to CT2-S1 of L2
8 Connect to CT2-S2 of L2
RS485-1 RS485 port 1
RS485-2 RS485 port 2
LAN LAN communication port STM does not have this port
ANT WIFI antenna port STM does not have this port
Type-C Speci󽗉ed Debug Interface
Product functions are under continuous development, please contact Sunways for more
scenarios.
※ 2.2 Application Scenarios and Wiring Connection

9
① Description：In split-phase system，export limitation can be realized.
② System con󽗉guration：1 x Sunways Single-Phase Inverter, 1 x STM-xxDxx-2.
③ Applicable grid mode：Split-phase system，2L+N，220/230/240V(L-L).
According to di󽗈erent design requirements, it is recommended to add fuses or circuit breakers to the
voltage input terminals to meet the safety requirements of relevant electrical codes.
N
UL1 UL2 UNI*I*I
S1 S2
S1 S2
*
*
L1 L1 L2 L2
L2
L1
RS485-1
Inverter
Fuses/Breaker
P1(House) P2(Grid)
1 2 3 4 5 6 7 8 9 10 A B
I
Single-phase Inverter
L1
N
Grid
Load 2
STM-xxDxx-2
WIFI/LAN
Grid Meter
RS485
Fuses/Breaker
CT-1
Server
Load 1
L2
CT-2
2.2.1 Scenario 2-1 (STM)

10
2.2.2 Scenario 2-2 (STK)
① Description：In split-phase system，export limitation and 24 hours energy consumption monitor-
ing can be realized.
② System con󽗉guration：1 x Sunways Single-Phase Inverter, 1 x STK-xxDxx-2.
③ Applicable grid mode：Split-phase system，2L+N，220/230/240V(L-L).
The communication wiring diagram of STM and single-phase grid-connected inverter (STS-1-3KTL/
STS-3-6KTL(-P)/STS-7-11KTL) is as follows:
1 1
1
3
5
2 2
3 3
2
4
6
Port 1 Port 2
Port 3
Single-phase Inverter
L1
N
Grid
Load 2
STK-xxDxx-2
Grid Meter
RS485
Fuses/Breaker
CT-1
Load 1
L2
CT-2
WIFI/LAN
Server

11
According to di󽗈erent design requirements, it is recommended to add fuses or circuit breakers to the
voltage input terminals to meet the safety requirements of relevant electrical codes.
N
UL1 UL2 UN I
*
I
*
I
S1 S2
S1 S2
*
*
L1 L1 L2 L2
L2
L1
RS485-1
Inverter
Fuses/Breaker
P1(House) P2(Grid)
1 2 3 4 5 6 7 8 9 10 A B
I
Grid
The communication wiring diagram of STK and single-phase grid-connected inverter (STS-1-3KTL/
STS-3-6KTL(-P)/STS-7-11KTL) is as follows:
1 1
1
3
5
2 2
3 3
2
4
6
Port 1 Port 2
Port 3

12
3 STM/K-xxDxx-3
※ 3.1 Communications port
Port Function Remark
1 Connect to L1
2 Connect to L2
3Connect to L3
4 Connect to N
5 Connect to CT1-S1 of L1
6 Connect to CT1-S2 of L1
7 Connect to CT2-S1 of L2
8 Connect to CT2-S2 of L2
9 Connect to CT3-S1 of L3
10 Connect to CT3-S2 of L3
RS485-1 RS485 port 1
RS485-2 RS485 port 2
LAN LAN communication port STM does not have this port
ANT WIFI antenna port STM does not have this port
Type-C Speci󽗉ed Debug Interface