Frequently recurring "#67 BMS Connection Lost" alarm on Solar charger, Orions (2), and Multiplus II

DIY
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Update:

I googled the problem while on the road, and AI provided a list of possible troubleshooting solutions. I tried the only one that I understood well enough to attempt, and I have not had a single problem since. It has been close to a couple of weeks. No issues.

The switch pictured below, which is supposed to be disabled by default, was turned on. I turned it off. All problems solved.

I don’t know how the switch got turned on … and I can see why this feature would cause continual rebooting, but I have no idea why it would cause all of the continual disconnection issues and the low voltage issue on the Multiplus II.

If anyone has a useful explanation, I would be interested.

Thanks, and best of luck to all.

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I have a relatively new system: VE Lithium 200ah 12.8V Smart LiFePO4 x 4, VE SmartSolar MPPT 100/30 charger, VE Orion XS 50A chargers x 2, VE Multiplus II 12/3000/120 inverter/charger, VE Lynx Smart BMS, VE Cerbo GX, and VE GX Touch 50. The system was working fine during my continued van build. However, on my first multi-day trip (I’m at Denali National Park in Alaska), starting on Day 1 and continuing every day (13 days), all three chargers keep losing connection to the BMS, and the Multiplus keeps generating a Low Battery Voltage warning and loses its connection to the BMS. And the Cerbo GX repeatedly re-boots itself (at least four times the night before last).

All of the lost connections seem to occur mostly after we drive for a couple hours or more in the morning and the Orions charge the battery bank up to 100%. The bank has never been below 75%, and is usually between 85% and 100%. In other words, the whole system works while it’s charging the battery bank. Then, later, all the devices lose connection to the BMS. This causes me to think that it’s NOT a loose cable connection issue. I’ve checked all of the VE Direct (black) and the Ethernet (blue) cables and they seem to be plugged in securely as before during the build.

Any advice would be greatly appreciated … while I can use the system, since it does charge up every day, it is concerning to me that the system seems to be incorrectly configured or set up in some way.

Thanks!

Brad

2

Thats like saying: My car has four wheels, an engine, a transmission and a radio. It might be technically correct, but still not very helpful.
If you’ve got an issue with the BMS communication, then at the very least you should specify which BMS, or battery type/manufacturer, you are using