Electrical Connection; Operating Principle; Connection Symbol - Helios COMBO SPH3600-BL SERIES User Manual

HELIOS COMBO SPH3600/5000-BL
The inverter is configured for Australia at the factory and therefore there is no need for installers to
configure the country code during installation.

4.1 Operating Principle

Figure4-1 is an electric circuit diagram showing the operating principle of the system.
PV array
48V battery
Figure4-1 Electric circuit diagram
1.
2.
3.
4.

4.2 Connection Symbol

Perform the electrical connection and communication connection in the bottom of inverter. The symbol
and its illustration is as shown Figure4-2 and Table4-1.

4 Electrical Connection

K1
PV
Energy
storage
inverter
K2
BATT.
K1 is PV input switch, K2 is battery switch, K3 is grid-connected switch, K4 is major load switch,
K5 is load switch, K6 is total grid switch.
Add a RCD in the BACK UP port and GRID port to avoid that leakage of electrical equipment
endangers human safety.
If inverter is equipped with DC switch, it is unnecessary to add PV input switch K1.
MEN link: The inverter maintains connection for the internal relay on neutral wire when entering
the off-grid mode.
Distribution box
RS485
K3
L
N
GRID
PE
K4
L
N
BACK UP
20
4 Electrical Connection
K5
L
RCD
N
PE
K6
L
Smart
N
meter
PE
L
RCD
N
PE
Load
Grid
Major load