Sunsynk Inverter Configuration (Closed Loop Without LYNK II)

The HELIOS ESS supports closed-loop communication with the Sunsynk inverters listed in the Closed-Loop Communication with Inverters table in the HELIOS ESS Closed-Loop Communication topic.

To enable communication between the inverter and batteries:

Connect a CAT6 or higher straight cable from the HELIOS ESS COM2 port to the CAN port of the Sunsynk inverter-charger.

Sunsynk CAN Connection

Using the touch screen and keypad on the inverter-charger, navigate to Main Screen > System Setup > Battery Setup.
Configure the Inverter-Charger. Specify the battery settings according to the instructions in the tables that follow to stop power conversion when there is a closed-loop communication error.
Touch the Up and Down arrows to scroll through the screens. Touch the checkmark button to save changes.
Exit and restart the inverter-charger.

NOTE

If there is a break in communication between the battery and inverter-charger for more
than ten seconds, the inverter-charger will safely stop operation, so long as the BMS
Lithium option is selected and the BMS_Err_Stop parameter is enabled on the Sunsynk
inverter-charger. The inverter-charger will display an F58 BMS Communication Fault
if communication is lost. The Sunsynk inverter-charger will check every five minutes and
resume closed-loop operation if communication is re-established.
If communication cannot be reestablished and you need to resume operation, you may
have to convert the Noark inverter to an open-loop configuration manually. For instructions
on configuring open loop, refer to Sunsynk Inverter Configuration (Open Loop).

NOTE
Depending on your system and particular use case, there may be other settings that require configuration. Refer to the inverter manual for information on these settings.

Closed Loop - Batt Type

Batt Type - Sunsynk Closed-Loop Settings

Batt type
Batt type	Select the Lithium option to display Lithium battery associated settings.
Activate	Select this check box.
Batt Capacity	These settings are handled by the BMS.
Charge Amps
Discharge Amps
CAN RS485	Select the CAN option and specify 0 (Pylon) for the Protocol.
BMS_Err_Stop	Select this check box to cause the inverter-charger to stop operating if there is a communication error.