Technical Help Needed: Paralleling Dyness DL5.0C Pro & DL5.0C in a Victron Parallel System (Ukraine)

Q&A and troubleshooting
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1

Hello everyone,

I am building a power backup system in Ukraine and I’ve run into a critical support issue regarding battery integration.

My Setup:

  • Inverters: 2 x MultiPlus-II 48/3000/35 (Parallel configuration).

  • Controller: Cerbo GX.

  • Batteries: 1 x Dyness DL5.0C Pro (intended as Master) and 1 x Dyness DL5.0C (Slave).

  • Firmware: Both inverters are updated to the latest firmware.

The Problem: I need to connect these two different generations of Dyness batteries in parallel. I am looking for the correct DIP-switch settings and confirmation on firmware compatibility for this “mixed” stack.

The Support Gap:

  • Local Distributor (Atmosfera): Refused to provide technical support or firmware because the units were purchased through different retailers (Amazon and Total-Energy).

  • Manufacturer (Dyness HQ): I’ve contacted them multiple times. After they found out I am in Ukraine, they stopped responding.

  • Local Installers: Some major companies here are even dropping Dyness from their portfolio due to this lack of manufacturer support.

My Questions:

  1. Has anyone successfully paired a DL5.0C Pro with a standard DL5.0C?

  2. Is there a specific firmware version for the older DL5.0C to make it “visible” to the Pro’s BMS via CAN-bus?

  3. What is the correct DIP-switch sequence for this mixed pair?

I have a Cerbo GX online and can provide VRM access if any Victron staff or experienced member can take a look at how the BMS communication is behaving.

Thank you for any help. In the current situation in Ukraine, getting this system 100% stable is a matter of survival.

2

You (may) connect your batteries DC only if each battery has an BMS.

I have done this with my batteries (with jk BMS) for some time, others with no less then 4 batteries for long time.

Image show combined batteries, with special can cable type A to Cerbo and simple utp cable between the batteries, dip switch; right battery has 1 dip switch up.

I would like to help you where possible!

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3

Does each one have comms with the GX as individuals.
I did attend a training for Dyness many moons ago… Haven’t installed any with Victron and never mixed models.

As far as i was aware you only needed the master dips to be set.
I do also recall them saying there was a device to make backawards compatible communication. I will go dig up my notes and see if i can find out if it is for the two you models you have.

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