Alpha ESS Backup Box-PLUS - System Wiring Diagrams

Backup Box-PLUS wiring diagram for three-phase inverter.
Please connect PE cable between Backup Box and the
inverter. If the inverter does not have PE port, these is
no need to connect PE cable.
System Wiring Diagram
Backup Box-PLUS wiring diagram for
single-phase inverter.
PE L3 L3 L3L2 L1 N L2 L1 N L2 L1 N
INV-Backup
Grid Load
Load1
Grid
Breaker
RCD
PV-INV
Breaker
INV-AC
Breaker
NL1
L2
L3 NL1
L2
L3
T10
Inverter
N
L1L2L3
NL1L2L3
INV-AC
INV-Backup
PV-INVERTER
L3
L2
L1
N
PV Panel
PV+
PV+ PV-
PV-
PV Panel
PV+
PV-
PV+
PV-
PE
PE
BAT+
BAT-
HV BOX
Battery
BAT+ BAT-
BAT+ BAT-
BAT+
BAT-
INPUT
OUTPUT
Load2 Load3
PE
PE
PE
N N
N
L L
L
NL1L2L3
NL1L2L3
NL1L2L3
NL1L2L3
METER
E-Bar
L3 NL1L2PE
PE
Grid
Backup Box-PLUS
PE L3 L3 L3L2 L1 N L2 L1 N L2 L1 N
INV-Backup
Grid Load
Load1
Grid
Breaker
RCD
PV-INV
Breaker
INV-AC
Breaker
NL1L2L3 NL1L2L3
Single Phase
Inverter
N
L1
NL1
INV-AC
INV-Backup
PV-INVERTER
L3
L2
L1
N
PV Panel
PV+
PV+ PV-
PV-
PV Panel
PV+
PV-
PV+
PV-
PE
PE
BAT+
BAT-
Battery
BAT+
BAT-
Load2 Load3
PE
PE
PE
N N
N
L L
L
NL1L2L3
NL1L2L3
NL1L2L3
NL1L2L3
METER
E-Bar
PE
Grid
L3 NL1L2PE
Backup Box-PLUS