.13.
.12.
4. Installation
4. Installation
Figure 4.6 PV input terminals
Cross-sectional
Dimension
Functionality
Where to connect
From PV strings to
terminal “DC+” and “DC-”
From Battery modules to
terminal “BAT+” and “BAT-”
From incoming AC distribution
box to terminal AC-GRID
“L1” and “L2”
From backup loads to terminal
AC-BACKUP “L1”,and “L2”
From AC groundings to copper
bar inside the wiring box
12-10AWG,
90°C Copper
10-8AWG,
90°C Copper
8-4AWG for 5-9K system,
6-4AWG for 10K system,
90°C Copper
10-4AWG,
90°C Copper
8-4AWG,
90°C Copper
PV DC source
Battery DC source
AC Grid connection
AC Backup
connection
Grounding connection
(Dimension depends on AC
backup cables and AC grid
cables)
PV Cables
Battery Cables
AC Grid Cables
AC Backup
Cables
Ground Cables
From meter to terminal MT
“A” and “B”. Details refer to
“4.2.2 Install the energy meter”
From battery to terminal CAN
“L” and “H”. Details refer to
4.2.3 Install the battery
Not Applicable in these systems
From grounding screw on the
inverter external cover
to the ground
4-pin COM port at the bottom
of the inverter.
(Detailed info please refer to
Solis datalogger user manual)
22-16AWG,
90°C Copper
22-16AWG,
90°C Copper
22-16AWG,
90°C Copper
Same as
Ground cable
Pre-assembled Plug
Communication
between inverter to Meter
Communication
between inverter to Battery
Not Applicable
in these systems
Ground the
inverter cover
Modbus/Sunspec
Communication between
the system and the
Solis monitoring portal
Meter COM cable
CAN Cable
BMS Cable
Cover External
Grounding Cable
Datalogger
(Optional)
4.3 PV Terminals
Please ensure the following before connecting the inverter:
Ensure the voltage of the PV string will not exceed the max DC input
voltage (500Vdc). Violating this condition will void the warranty.
Ensure the polarity of the PV terminals and battery are correct.
Ensure the DC-switch, battery, AC-BACKUP, and AC-Grid are all in their off-states.
Ensure the PV resistance to ground is higher than 20K ohms.
PV wire requirements 12-10AWG 90°C Copper
:
Table 4.1 Wire Specification
1. Ensure you use a cable within the correct specifications as shown in the
image below.
There are two AC terminals and the assembly steps for both are the same.
Remo
v
e
the
AC
connector
parts
from
the
packaging
.
4.4 Assembling
the
AC
Terminals
Describe
Recommend
10~4 AWG
10 AWG
18mm
Traverse cross sectional area
Exposure Length
AC-BACKUP
AC-GRID
(For 5~9KW)
AC-GRID
(For 10KW)
8~4 AWG
6~4 AWG
8 AWG
6 AWG
Table 4.2 AC wire specification
optional RGM
NOTE:
The installation shall meet the National Electrical Code, ANSI/NFPA 70 and
Canadian Electrical Code wiring methods.
