This page tells you how to set up a Victron Energy system with Dyness low-voltage (48 V class) lithium iron phosphate (LiFePO4) batteries.

Dyness batteries communicate with the Victron GX device over BMS-Can.

These Dyness models are for use with the 48 V range of Victron systems.

The settings in sections 8 and 12 are different for the two voltage classes. Make sure that you know the nominal voltage of your model.

Other models. These models are not on the 2026 Dyness compatibility list. Dyness states that they use the same BMS-Can protocol:

• 48 V models: B4850, VB4850, B3, A48100, B48100, BX48100, Powerbox F, PowerDepot.
• 51.2 V models: BX51100, B51100, Powerbox Pro, PowerDepot H5B.

The BMS sends the charge and discharge current limits to the GX device over BMS-Can. Refer to the Dyness datasheet for the maximum currents of each model.

Dyness batteries are compatible with these Victron products when you connect the battery through BMS-Can to a GX device:

• GX devices: a GX device is necessary, for example the Cerbo GX or the Ekrano GX.
• Inverter/chargers: all 48 V models of the VE.Bus MultiPlus, MultiPlus-II, Quattro and Quattro-II, and the RS range. Connect the VE.Bus models to the VE.Bus port of the GX device. For minimum firmware, refer to section 3.
  • The EasySolar-II GX and the MultiPlus-II GX have an integrated GX device. They do not need a separate GX device.
• Solar chargers: all 48 V SmartSolar and BlueSolar MPPT. Connect each solar charger to the GX device through VE.Direct or VE.Can. This connection is mandatory. The GX device uses it to control the charge voltage and current.
• Remote monitoring: VRM Portal (SOC, voltage, current, temperature, alarms).

The battery BMS sends these values to the GX device:

• State of Charge (SOC)
• Charge Voltage Limit (CVL)
• Charge Current Limit (CCL)
• Discharge Current Limit (DCL)
• Temperature

The GX device sends these limits to all connected Victron inverter/chargers and solar chargers through DVCC.

Important: Only 48 V Victron inverter/charger models are compatible with Dyness low-voltage batteries. 12 V and 24 V models are not supported.

Always install the latest firmware on all devices during commissioning and when you troubleshoot a problem.

To connect Dyness batteries to a Victron system, you need:

1. A Victron GX device. Refer to section 2.
2. A VE.Can to CAN-bus BMS cable Type A (Victron part number ASS030710018). Connect the side with the label “CAN-bus BMS” to the CAN IN port of the master battery. On some models this port has the label EXT CAN. Connect the side with the label “VE.Can” to the BMS-Can port of the GX device.
3. A Victron VE.Can RJ45 terminator in the BMS-Can port of the GX device.

The Type A cable has this pinout:

The Dyness battery uses pins 4 and 5 for the Victron connection. Pin 6 is not used in the battery.

Important: Do not use a standard network cable (straight-through RJ45). Do not use the Type B cable. On current Dyness models, the Type B cable connects the GX ground to pin 2, which is an RS485 signal pin.

Dual-CAN GX devices (Cerbo GX, Ekrano GX): the BMS-Can port (500 kbit/s) is a different bus from VE.Can (250 kbit/s). Do not connect the Dyness battery to the bus that has the Victron VE.Can devices.

Single-CAN GX devices: when you set the CAN port to CAN-bus BMS (500 kbit/s) for the Dyness battery, you cannot use it for VE.Can (250 kbit/s) devices. Plan the system for this.

The battery can also operate at 250 kbit/s (DIP switch #4 ON). Victron has not tested the battery at 250 kbit/s on a VE.Can port.

On the GX device, go to Settings → Services → [BMS-Can port] → CAN-bus profile.

Select CAN-bus BMS (500 kbit/s).

When the communication operates, the battery shows in the device list as DYNESS-L Battery.

Go to Settings → System setup → Battery monitor.

Make sure that the Dyness battery is the selected battery monitor. The GX device then uses the SOC, voltage and current from the BMS.

DVCC (Distributed Voltage and Current Control) sends the charge and discharge limits from the BMS to the connected Victron devices. DVCC must be on for Dyness batteries.

Important: Venus OS does not set the DVCC settings automatically for Dyness batteries. You must set them manually. Go to Settings → DVCC.

If you set “Limit charge current” to ON, the system uses the lower value of the DVCC limit and the CCL from the BMS.

For a full explanation of each setting and how it works with a CAN-bus BMS, refer to the Victron DVCC manual.

The Dyness BMS sends CVL, CCL and DCL to the GX device over BMS-Can. The GX device sends these values to all connected inverter/chargers and solar chargers through DVCC.

The BMS changes CCL and DCL with the SOC. When the battery is full, the BMS sets CCL to 0 A:

• Without DC-coupled PV feed-in: the GX device signal to the charge controllers to stop producing charge current.

• With DC-coupled PV feed-in on (ESS with a VE.Bus inverter/charger): the GX device does not limit the solar chargers. The CVL then controls the end of charge.

When the SOC decreases to 15 %, the BMS sets DCL to 0 A. The inverter then stops.

The Dyness BMS has its own protection, independent of the Victron system. In normal DVCC operation, Victron devices obey the CVL, CCL and DCL from the BMS and do not reach the protection thresholds.

For the voltage, current and temperature protection values, refer to the Dyness user manual for your model.

• To turn on the battery, push and hold the WAKE/SLEEP (SW) button for 3 seconds. In a parallel bank, refer to the Dyness manual for the start sequence.
• The battery goes into sleep mode automatically after 72 hours with no load, no charge and no communication.

• Set the DIP switches on the master battery only. Refer to section 4.1. Keep the slave batteries at the factory setting (all OFF).
• If the system has only one battery, that battery is the master.
• Connect the GX device to the CAN IN port of the master battery.
• Connect the CAN OUT port of each battery to the CAN IN port of the next battery.
• When the bank has more than 12 batteries, install a Dyness CAN terminator in the CAN OUT port of the last battery.
• Keep the communication cables between the batteries short.
• Do not mix batteries of different models, or old and new batteries, in one bank.
• For the maximum number of batteries in parallel, refer to the Dyness manual for your model.

Important: When DVCC is on, the system compares the BMS limits with the settings in VEConfigure or VictronConnect. The system always uses the more conservative value:

• Charge voltage: the lower value applies. If the BMS CVL is lower than the charger setting, the CVL applies. If the charger setting is lower than the CVL, the charger setting applies.
• Discharge shut-down: the higher voltage applies. If the inverter low-voltage shut-down setting is higher than the BMS limit, the inverter stops at its own setting.

LiFePO4 batteries do not need a conventional bulk, absorption and float cycle. When DVCC is on, the BMS limits the charge voltage through CVL.

In an ESS, select System uses LiFePO4 with other type BMS in the ESS assistant.

Fallback charger and shut-down voltages for use without CAN communication.

For reliable operation, you need a minimum number of batteries for each Victron inverter/charger size. Contact your battery supplier for these values.

1. Make sure that CAN-bus BMS (500 kbit/s) is selected. Go to Settings → Services → [CAN port] → CAN-bus profile.
2. Make sure that the DIP switches of the master battery are correct, and that DIP switch #4 is OFF (500 kbit/s). Refer to section 4.1. Turn the battery off and on again after you change a DIP switch.
3. Make sure that the cable connects battery pins 4 and 5 to GX pins 7 and 8. A standard network cable does not operate. Refer to section 4.
4. Make sure that the cable is in the CAN IN port of the master battery.
5. Make sure that the VE.Can terminator is in the BMS-Can port of the GX device.
6. Restart the GX device.

1. Venus OS versions before v2.90 show a Dyness battery as a Pylontech battery. Update the GX device to the minimum firmware or later. Refer to section 3.

1. Go to Settings → DVCC. Make sure that DVCC is ON and SVS, STS and SCS are OFF. Venus OS does not set these values for Dyness batteries. Refer to section 7.
2. Make sure that the Dyness battery is the battery monitor. Go to Settings → System setup → Battery monitor.
3. Make sure that no other monitor (for example a SmartShunt) is the primary battery monitor.

1. This is normal. At 100 % SOC the BMS sets CCL to 0 A. Without DC-coupled PV feed-in, the solar chargers then supply the loads only. Refer to section 8.

1. This is normal. At 15 % SOC the BMS sets DCL to 0 A. Refer to section 8.

1. The BMS calculates the SOC. Let the battery charge to 100 % SOC at regular intervals so that the BMS can calibrate the SOC.
2. For control functions that must operate near an empty battery (for example a generator start), use the battery voltage, not the SOC.

1. Make sure that all batteries in the bank are the same model and hardware version. Refer to section 11.
2. Make sure that only the master battery has the Victron DIP switch setting.
3. Examine the cables between the batteries. Make sure that each cable goes from CAN OUT to CAN IN.

Further details about installation and configuration are available from Dyness. Refer to the Dyness download center.

Support for this battery should first come from your battery supplier.

Support from Victron is limited to the online Victron Community.