Setting Managed Configuration on the SUNSYNK Inverter-Charger

NOTE
In a managed (closed-loop) configuration with the BMS Lithium Batt function enabled, the BMS_Err_Stop parameter must be enabled. If the BMS_Err_Stop parameter function is not enabled, in the event of a communication error, the SUNSYNK inverter-charger will continue to operate based on the last communicated battery values. Depending on the mode of operation at the time of a communication fault and given enough time, the SUNSYNK inverter-charger will eventually put the attached battery into an overcharged or fully discharged state. When that occurs, either situation will trigger the Discover Lithium Battery BMS to self-protect and disconnect the battery from the system.

NOTE

In a managed (closed-loop) configuration with the BMS Lithium Batt function enabled, the BMS_Err_Stop parameter must be enabled. If the BMS_Err_Stop parameter function is not enabled, in the event of a communication error, the SUNSYNK inverter-charger will continue to operate based on the last communicated battery values.
Depending on the mode of operation at the time of a communication fault and given enough time, the SUNSYNK inverter-charger will eventually put the attached battery into an overcharged or fully discharged state. When that occurs, either situation will trigger the Discover Lithium Battery BMS to self-protect and disconnect the battery from the system.

After selecting the SUNSYNK communication protocol for the LYNK II, complete the managed (closed-loop) configuration settings on the SUNSYNK inverter-charger.

Ensure the Discover Lithium Batteries are networked with LYNK II and that the LYNK II is connected to the SUNSYNK CAN port.

If necessary, first configure SUNSYNK inverter-chargers to operate in parallel by establishing the inverter-charger master/slave relationships and phase designations before setting the parameters for battery operation. Configuring the master inverter-charger will cascade parameters and settings to the slave inverter-chargers.

Managed (Closed-loop) Configuration

Refer to the latest Discover Energy Systems documentation for battery values and the latest SUNSYNK documentation for menu navigation and details on the setup procedure.

Set the Discover Lithium batteries to ON and set the inverter-charger to ON.
Using the touch screen and keypad on the inverter-charger, navigate to Main Screen > System Setup > Battery Setup.
Specify the battery settings according to the instructions in the table that follows.
Touch the OK button to save changes.
Exit and restart the inverter-charger.

NOTE
If using multiple inverter-chargers, configure SUNSYNK inverter-chargers to operate in parallel before setting the battery operation parameters.

Managed (Closed Loop) - Batt Type

Batt Type Managed (Closed-Loop) Settings

All values and parameters assume an operating temperature of 25 °C.

Batt type
Batt type	Select the Lithium option to display Lithium battery associated settings.
Activate	Select this check box.
Batt Capacity Charge Amps Discharge Amps	These settings are handled by the BMS.
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. If the BMS_Err_Stop check box is cleared, despite a communication error, the inverter-charger will continue to operate using the last communicated battery values, which will eventually cause the batteries to invoke protection.