Enabling LYNK II to Communicate with Deye Devices

When properly connected to a closed-loop network and set to use the Deye protocol, LYNK II will transmit real-time parameters from the Discover Lithium battery, including voltage, current, temperature, state of charge, and fault conditions, to a Deye inverter-charger. LYNK II will also transmit charge voltage and current requests from the Discover Lithium battery to a Deye inverter-charger.

LYNK ACCESS software for 64-bit Windows 10 / 11 is required to configure LYNK II settings for closed-loop CAN communication with Deye inverter-chargers.

If there is a break in communication between the LYNK II and the inverter-charger for more than ten seconds, the inverter-charger will safely stop operation, so long as the BMS Lithium Batt and the BMS_Err_Stop parameters are both enabled on the Deye inverter-charger. The inverter-charger will display an F58 BMS Communication Fault if communication is lost. The Deye inverter-charger will check every five minutes and resume closed-loop operation if communication is re-established. However, if communication cannot be reestablished, you may have to manually convert the Deye inverter-charger to an open-loop configuration to resume operation. Refer to Deye Open-loop Configuration.

NOTE

In a 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, the Deye inverter-charger will continue to operate based on the last communicated battery values. Depending on the mode of operation at the time of communication fault, and given enough time, the Deye 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.
Neither Discover Lithium batteries nor LYNK II directly control Deye relay functions, generator starting or other grid-interactive features. These functions are controlled through the programming of the Deye inverter-charger.