EG4 Batteries and a Victron Cerbo GX: What Victron Lists and What Worked for Us

EG4 is not on the Victron battery list in the Cerbo manual. What the manuals say, and what showed up when we connected ours.

Last reviewed 2026-10-12.

What the manufacturer documents

• The Cerbo GX manual says its two CAN ports can each be set to VE.Can (250 kbit/s, the default), BMS-Can (500 kbit/s) or CAN-bus BMS (250 kbit/s), and that BMS-Can is for managed lithium batteries. (victronenergy.com)
• The manual says VE.Can and BMS-Can must not share the same bus, and that the CAN bus is terminated at the GX device with the included terminator, with the battery side following the battery manufacturer's instructions. (victronenergy.com)
• The manual's list of third-party batteries known to have been tested does not include EG4. For batteries not on its list, it says many are compatible and permitted under warranty, but they need additional information and support from a local supplier, and that Victron gives its battery protocol specification to battery manufacturers on request. (victronenergy.com)
• A separate line in the same manual says to use only batteries listed on Victron's compatibility list to ensure proper communication, and that others are not supported. (victronenergy.com)
• The EG4 Indoor 280Ah quick start guide has a paralleling section that covers how batteries are addressed, a BMS reset step, and which battery connects to the inverter's BMS communication port. We do not reproduce those steps. (eg4electronics.com)
• The same guide lists the battery's communication ports as RS485 and CAN, which it says can be customized. (eg4electronics.com)
• EG4's specification sheet for the WallMount Indoor 280Ah battery, version 1.1.8, lists selectable closed-loop communications with EG4, Schneider, Sol-Ark, Victron, Growatt, Megarevo, Luxpower and Deye inverters. (eg4electronics.com)

What happened to us

• We connected an EG4 WallMount 280Ah Indoor battery (the model is the owner's confirmation) to a Cerbo GX through the battery's CAN port and the Cerbo's BMS-Can port using a two-wire communication cable. The Cerbo's screen then listed the battery as an EG4 LL device and showed its voltage, current, state of charge, state of health, temperature, alarms and parameters. (video)
• The Cerbo GX was part of a system with a Victron MultiPlus-II 48 V 3000 VA inverter/charger (model details are the owner's confirmation). (video)
• The battery's DIP switches were set with the first switch down and the others up. We said that with more than one battery each would need its own address. (video)
• With the battery connected, the Cerbo showed the EG4 battery as connected; with the cable unplugged it showed it as not connected. (video)
• In that video we said the method worked with the indoor, Power Pro and LL batteries and not with a LifePower4 battery. In a later video we added a LifePower4 V2 battery to the same system and the Cerbo then showed two battery modules, with the second battery set to address 2. (video)
• In that later video the Cerbo's discharge current limit rose to 300 A but the charge current limit stayed at about 100 A, which we thought should be higher. We did not resolve it. (video)
• In our firmware adapter review, the battery connected to our Victron system had its CAN setting on P06 VCT, with two Victron Quattro inverters on the system. (video)

What the sources say compared with what we saw

What we did not verify

• EG4 is not on the battery list in the Cerbo manual we read. EG4's own specification sheet lists selectable closed-loop communication with Victron inverters, but we have not verified that Victron or EG4 approve this exact battery, Cerbo and MultiPlus combination or its firmware. That the Cerbo showed our battery does not mean Victron supports it.
• We did not record which CAN profile was set on the Cerbo, or which protocol setting was on the battery in the Cerbo videos. The only record of a battery CAN setting is the P06 VCT shown in our firmware adapter review.
• We did not record battery or Cerbo firmware versions at the time. In the first video we said a battery that does not connect may need a firmware update; we have not verified that against an EG4 document.
• We have not re-tested this since the videos, and the manuals we cite are current versions that may differ from what applied then.
• We did not test charge or discharge limits against the battery manufacturer's figures.
• In the later video a LifePower4 V2 battery on its own also showed a charge current limit of about 5 A, which we said looked like a firmware behaviour and did not resolve. Neither limit proves firmware was the cause, and a battery showing up on the Cerbo does not mean charge control was right.
• The owner reports the system is still running this way as of 2026-10-11. We have not recorded the Cerbo GX hardware revision, and the manual we cite describes the MK2 and MK3 models.

Questions and answers

Is EG4 on Victron's battery compatibility list?

Not in the list in the Cerbo GX manual we read. EG4's own specification sheet for the 280Ah Indoor battery lists Victron among its selectable inverter communications. The Victron manual says unlisted batteries need support from a local supplier.

Which Cerbo port did we use?

The Cerbo's BMS-Can port, which the manual describes as a 500 kbit/s CAN profile for managed lithium batteries.

What did the EG4 guide say about the address?

That the master battery is set to address 1 and any others to different addresses in ascending order.

Sources

• Victron Cerbo GX manual (Victron Energy), battery compatibility and CAN interface sections
• EG4 Indoor 280Ah Battery Quick Start Guide, version 1.4.0 (EG4)
• EG4 WallMount Indoor 280Ah Specifications Sheet, version 1.1.8 (EG4)

Videos this comes from

• How to setup Victron and EG4 Battery Communications with Multiplus and Cerbo GX – Connecting an EG4 indoor battery to a Cerbo GX
• EG4-LifePower4 V2 Lithium Battery BMS communications with Victron Multiplus Cerbo – Adding a LifePower4 V2 battery to the same system
• EG4 Battery Works With CERBO GX? YES! – Short answer: does it work
• EG4 Battery Firmware Adapter Review & Tutorial (2025) – Firmware Update Made Easy? – Shows our battery's CAN setting

Related topics

• Victron and EG4 Together

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