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Wattsonic AIO ESS | USER MANUAL
Communication between inverter and
battery
The communication between meter and
inverter is an RJ45 interface cable. A 3M
length battery communication cable is
already attached to the inverter when you
received it, and you just need to insert it to
the BMS interface of the inverter and Sub-
Master BMS.
1) An EMS communication cable needs to be
connected when to control the operation
of a hybrid inverter through the EMS, and
communication between EMS and inverter is
RS485.
2) Wattsonic WTS 6~12kW series hybrid
inverter integrated a set of relay output
dry contacts with the contact capacity
230Vac/1A or 30Vdc/1A that are very useful
in some special circumstances, such as in
the purely off-grid system, it can be used to
trigger the backup generator. Please contact
your installer or Wattsonic service team to
learn more detailed operation steps.
Multiple inverters parallel connection/
EMS/Relay output dry contact
Multiple inverters parallel connection, EMS
and relay output dry contact use the 6pin
terminal on the right side, and you can use
the matching 6pin terminal in the accessory
box to make the connection.
No.
Color
Meter Side
Battery Side
1
Orange&White
/
RS485_A
2
Orange
/
RS485_B
3
Green&White
RS485_B
/
4
Blue
/
CAN_H
5
Blue&White
/
CAN_L
6
Green
RS485_A
/
7
Brown&White
RS485_B
/
8
Brown
RS485_A
/
Note: Before purchasing the battery, you have to make sure the battery you selected
is in the battery approval list of Wattsonic, otherwise, the system may not work
properly. Please contact your installer or Wattsonic service team for confirmation if
you’re not sure about it.
No.
1
2
3
4
5
6
Definition
CAN PAR
EMS
RLY OUT
CAN_H
CAN_L
RS485_B
RS485_A
RLY_COM
RLY_NO
RJ45 terminal connection sequence and
definition.
1
2
3
4
5
6
7
8
2
4
6
1
3
5
EMS
RS485_B
RS485_A
Inverter
RS485_B
RS485_A