The following table depicts the pinouts used on the Growatt inverter, as well as the CAN port of the SK48v100. When hand-making cables, we highly recommend confirming the pin configurations, as mistakes can lead to very difficult-to-troubleshoot problems.
|Growatt / SK48v100 Pinout Table|
|GND||Pin 6||Pin 2|
|CAN-L||Pin 5||Pin 5|
|CAN-H||Pin 4||Pin 4|
If you wish to use your own cable, do so with caution; the following pinout table creates a cable that is bidirectional, meaning either end can be plugged into the Growatt inverter or the battery while still preserving full functionality. When using competitor’s cables, they may require certain ends be plugged into corresponding devices.
|Connector #1||Connector #2|
|Pin 1||Pin 1|
|Pin 2||Pin 2|
|Pin 3||Pin 3|
|Pin 4||Pin 4|
|Pin 5||Pin 5|
|Pin 6||Pin 6|
|Pin 7||Pin 7|
|Pin 8||Pin 8|
Connection port & Procedure
The communication cable plugs into the CAN port of the inverter (Note: If none of the ports are marked CAN, the port is sometimes marked as “BMS”).
The communication cable plug marked “SK48V100” plugs into the “CAN” port of the master battery. Verify the DIP switches of the master battery are set to address #1, ON-OFF-OFF-OFF as described previously and slave batteries are set to unique address as designated here.
Ensure all batteries are in the “BMS-OFF” state prior to installing the cable(s. After the cable(s) have been installed, power up the system making sure to follow the proper start-up procedure.
Two important settings must be changed in the Growatt inverter in order to establish communications.
- Press & hold the “⏎” key for approximately 3 seconds to enter the main menu.
- Using the up and down arrows, navigate to setting #5. Press the “⏎” key to change the setting. Using the up and down arrows, adjust the setting parameter until “LI” is shown. Press the “⏎” key one more to save the setting.
- After adjusting setting 5, as described in step 2, the menu should automatically change to setting #36. Change the value of setting #36 to “L52”. Press the “⏎” key one more to save the setting.
- Press the ESC button to exit the menu and save settings.
Note: If any faults are displayed, power off the inverter & battery. If any errors persist, please contact SOK Customer Service.