Inverter Manipulation
Electrical Connection
7.6 Emergency Stop Switch Connection
EPO
EPO terminal connection and PIN definition
Ø
GND
STOP_NO
STOP_NC
A1-Hybrid series inverter is equipped with a communication port (EPO for short),
which will receive a signal and shut down inverter.
EPO connection diagram
Ø
EPO port
Emergency Stop Switch
1
6
STOP_SW_NO
1
2
3
4
5
6
STOP_SW_NC
GND
X
X
X
Terminal
Required torque
Wire size permitted
EPO
Type
6-pin Terminal Block
2.3 Ibf-in
20AWG
Note for specific wiring requirements, refer to Section 7.1.
For specific wire size and torques, refer to Section 7.1.
8 Inverter Operation Procedures
8.1 Check all Below Steps Before Starting Inverter
Wiring Box of the A1-Hybrid Series Inverter
A1-Hybrid
Series Inverter
EPO
①
E
nsure the main switch is in the “OFF” position.
②
Ensure the inverter is properly mounted to the wall.
③
Ensure all the DC wirings and AC wirings are completed.
④
Ensure the meter is connected properly.
⑤
Ensure the battery is connected properly.
⑥
Ensure all grounded busbar are connected properly.
⑦
Ensure the PV arrays are connected properly.
⑧
Ensure the RSD controller is connected properly.
⑨
Ensure the loads and critical loads are connected property, and the critical loads
rating is within nominal rating range.
⑩
Ensure the manual bypass breaker (mechanical interlock) is connected properly
and the original state should be connected with inverter side.
+ _
+ _
+ _
+ _
+ _
P
V 1
P
V 2
P
V 3
P
V 4
B
A
T
LO
A
D
R
E
S
E
R
V
E
L1 N L2
L1 N L2
G
R
ID
L1 N
L2
L1 N L2
T
ra
n
sf
o
rm
e
r
Meter Port
EPO Port
BMS
Port
LAN
Port
Wi-Fi/
4G Port
RPSD Port
Ground Busbar
PV Array #1
PV Array #2
PV Array #3
PV Array #4
RSD Modules
RSD Modules
RSD Modules
RSD Modules
PV 1+
PV 1 -
PV 2+
PV 2 -
PV 3+
PV 3 -
PV 4+
PV 4 -
RPSD CT
GROUND Busbar
Ground
Electrode
Conductor
(Ground Rod)
Battery
+
-
RPSD
Controller
N.C.
N.O.
GROUND Busbar
Ground
Electrode
Conductor
(Ground Rod)
L2
CT 1
N
L1
CT 2
N L1 L2
N L1
L2
AC Backup-to
Critical Loads
N L1 L2
Auto
transformer
MAIN PANEL
+
-
+
-
+
-
+
-
W
i-Fi M
o
d
u
le o
r
4
G M
o
d
u
le
Emergency Stop
Switch
Signal
LEGEND
EPO Cable
LAN Cable
BMS Cable
Meter Cable
CT Cable
AC
LEGEND
HOT L1
HOT L2
Neutral
Ground
BATTERY
LEGEND
PV
LEGEND
Positive
Negative
Ground
Positive
Negative
Ground
+
-
+
-
RPSD Cable
⑩
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑥
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