Meritsun 48/200 Battery Integration with Cerbo GX

Q&A and troubleshooting
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1

We are currently working on integrating 20x Meritsun 48V 200Ah (48/200) batteries in parallel with a Victron Cerbo GX, but we are facing challenges with communication and data retrieval.

Key Questions & Issues:

  1. Communication Protocol:
  • Should the connection be made via VE.Can or BMS.Can?
  • The available Meritsun documentation Meritsun to Victron does not clearly specify which protocol is best when integrating with Victron systems.
  1. Data Retrieval Issues:
  • Despite following the manufacturer’s guide, we are unable to retrieve any meaningful battery information.
  • The battery bank is connected, but no data is being displayed on Cerbo GX or VRM.
  • Are there any specific VictronConnect or VRM settings that need to be configured for this setup?
  1. Termination & Proper Wiring for 20 Batteries in Parallel:

  • How should the CAN communication be wired when using 20 batteries in parallel?

  • Do we need termination resistors, and if so, where should they be placed?

  • Is there a recommended wiring diagram for this type of setup?

  • Battery Model: 20x Meritsun 48V 200Ah (48/200), connected in parallel

We would really appreciate any insights, experiences, or recommendations from the community to get this setup running correctly.

2

This isn’t a supported battery so guidance needs to come from the battery manufacturer.

Basic rules still apply, typically bms can should be used, but some batteries don’t run at that baud rate.
The cable you use may also be battery specific.
CAN is always terminated on either end of the chain, follow the manuals, as this is documented.
Some batteries have built in termination, others don’t, again manufacturer should advise.

3

If you look on the document/video in the link its what the battery brand is given.