SunSynk | Solar MD

SUNSYNK AND SOLAR MD

SunSynk inverters with Solar MD Lithium-Ion batteries have been tested and certified by Solar MD R&D department.

SunSynk inverters come in multiple sizes ranging from 3kW - 16kW and are distributed by Ellies South Africa.

If you are installing SunSynk with Solar MD batteries for first time please read the SunSynk installation manual.

For this installation a Logger V2 and an active internet access during the commissioning is recommended.

The maximum charge and discharge power of the inverter should be considered.

Supported models via CAN BUS: SunSynk 5.5kW, 8.8kW and 16kW single phase, and 10kW and 12kW 3 phase inverters.

SunSynk and Solar MD Lithium-Ion batteries:

Can Bus (500kbit/s) is used between Solar MD Logger V2 and SunSynk and requires CAN translator software for digital control from the battery.

Minimum required hardware:

Battery modules required – 1x SS4074 / SS202 (7.4kWh) per SunSynk 5.5kW. Similarly 2x SS4074 / SS202 (7.4kWh) per SunSynk 8.8kW. Or 1x SS4143 (14.3kWh) per 5.5kW/8.8kW inverter. This is important due to the maximum discharge current of the SunSynk.

General Information:

For protection the battery will send the inverter one or more of the following status commands:

Charge Enable - This tells the inverter that charging is permitted. This will be disabled when the charge control value is less than or equal to 50%. When the value is less than 50% the inverter will discharge the battery with 1.4A until either the actual voltage reaches the charge voltage setpoint value or the charge control current exceeds 0A.
Discharge Enable - This tells the inverter that discharging the battery is permitted. This will be disabled when the discharge control value is less than or equal to 50%.
Request force charge I - When the battery's discharge control drops below 30% it will send this command to the inverter forcing it to charge the battery. If no charge source (Grid or PV) is available the inverter will go into error mode (F56 DC_VoltLow_Fault) and will stop supplying the load until another source of energy is available.
Request force charge II - When the battery's discharge control drops below 15% it will send this command to the inverter forcing it to charge the battery. If no charge source (Grid or PV) is available the inverter will go into error mode (F56 DC_VoltLow_Fault) and will stop supplying the load until another source of energy is available.

Direct BMS to Inverter communication

Communication Cable Connection

It is recommended that CAT5e cable be used. The termination resistor on the last battery should be ON, the rest should be OFF.

Note: When connecting multiple inverters refer to the inverter manual for more information.

Single inverter, Single battery

Single inverter, multiple batteries

Multiple inverters, multiple batteries

CAN Communication:

For connection between Logger V2 and SunSynk, only the master inverter must be connected to Logger V2.

For Logger V2 hardware revisions 212/213 that support RJ45 CAN bus connections, a straight-through patch cable can be used between the Logger V2 and the SunSynk master inverter.

Monitoring Sunsynk inverters with the Solar MD Logger V2

multiple inverter, multiple batteries.png

login.mypower24.co.za CANBUS Deye/SunSynk/Goodwe ES Control Bridge

Digital control Configuration – CAN Translator software on LoggerV2

Firstly on the Solar MD portal (http://login.mypower24.co.za) select Deye/SunSynk/Goodwe ES Control Bridge on CANBUS 2:

Menu path: My Devices → Logger myPower → Interfaces →CANBUS 2.

Secondly choose Deye/SunSynk/Goodwe ES Control Bridge.

On the SunSynk inverter proceed to set up the battery: “setup as lithium” and the CAN bus speed 500kbit/s.

Menu path: Settings → Battery Setup → Batt type then select Lithium as battery type and CAN for inverter protocol.

Note: the image below might differ depending on the firmware version of your inverter display.

Finally the standard settings are set to 80% battery Depth of Discharge during the day and the night.

You will also be able to see Solar MD state of charge in “%” and kWh on the SunSynk display.