update : it was a communication bug , it was solved after upgrading the battery BMS firmware 

"Hello, I have a Triple A inverter (Voltronic axpert VM 3) and felicity 200 48  and I’m getting the 'BP' error at different times. Sometimes it happens once a day, sometimes once a month. Sometimes, the alarm beeps, the error code appears, and then it beeps again, the code disappears, and the screen goes back to normal. Other times, I wake up to find the inverter completely turned off.

Two weeks ago, I woke up and everything was working fine, but I noticed the battery voltage was around 24V, even though my battery setup is 48V. The system was functioning normally and the loads were running, but the inverter wasn’t charging the battery.

I updated the firmware to 60.76, and the problem disappeared.

This morning, I woke up and found it turned off again."

I turned it on , everything is normal except having wrong time in the logs on the mobile application 

 

anyone has an idea why it turns off ?

Edited December 1, 20241 yr by esmail-kassir
update

bP" is the "Battery not Present" error.

BMS would have disconnected the battery due to too high or too low battery voltage. 

2 hours ago, TaliaB said:

bP" is the "Battery not Present" error.

BMS would have disconnected the battery due to too high or too low battery voltage. 

Theoretically you are 100 % correct 

but I tend to believe this is firmware bug , as it coexists with other strange behavior. Also the battery screen doesn’t show any warning icons or messages . And it happens out the peak usage hours ( actually it didn’t happen during any moment where the load ir temperature where high) 

22 hours ago, esmail-kassir said:

Two weeks ago, I woke up and everything was working fine, but I noticed the battery voltage was around 24V, even though my battery setup is 48V. The system was functioning normally and the loads were running, but the inverter wasn’t charging the battery.

The VM series saves a little money by having one firmware for both 24 V and 48 V models. It decides which hardware it is running by reading the voltage on a pin at power-up. The result is stored in RAM; I think it's static RAM but it might be dynamic. In either case, a glitch in the power supply could cause the RAM contents to change, making it think that it's running on the wrong hardware. This can be very bad; I would always restart immediately if that happens.

Though possibly the problem could happen due to a comms error that happened to fluke a good CRC. The display remembers what the nominal voltage of the system is from the results of the last QPIRI command. That's far less dangerous. You could find out if it's the display or the inverter itself by unplugging and re-plugging the RJ-45 cable from the removable display (not so easy if you happen to have a model with the round/colour display). Warning: this will effectively switch off the main switch, which will drop the loads. Reconnect the display before the inverter completely shuts down; it should not shut down if you have a charging source (AC-in or PV).

A few screws should make this RJ-45 cable accessible.

If it's the removable display firmware, then updating that may fix the problem.

1 hour ago, Coulomb said:

The VM series saves a little money by having one firmware for both 24 V and 48 V models. It decides which hardware it is running by reading the voltage on a pin at power-up. The result is stored in RAM; I think it's static RAM but it might be dynamic. In either case, a glitch in the power supply could cause the RAM contents to change, making it think that it's running on the wrong hardware. This can be very bad; I would always restart immediately if that happens.

Though possibly the problem could happen due to a comms error that happened to fluke a good CRC. The display remembers what the nominal voltage of the system is from the results of the last QPIRI command. That's far less dangerous. You could find out if it's the display or the inverter itself by unplugging and re-plugging the RJ-45 cable from the removable display (not so easy if you happen to have a model with the round/colour display). Warning: this will effectively switch off the main switch, which will drop the loads. Reconnect the display before the inverter completely shuts down; it should not shut down if you have a charging source (AC-in or PV).

A few screws should make this RJ-45 cable accessible.

If it's the removable display firmware, then updating that may fix the problem.

The 24 issue occurred once and never happened again 

but I still have the sudden shutdown issue and or BP Fault only when PV availability 

it's belong to OVP form battery side, what is your protocol for BMS connection?

Brother, this is a fold on the side of your battery. Either your battery is damaged or its connections are loose. Your India should check all the viruses and connections of your battery in a duffle and tighten their screws properly. Otherwise you need to replace the battery 

it was a communication bug , it was solved after upgrading the battery BMS firmware 

On 2024/12/01 at 11:24 AM, esmail-kassir said:

it was a communication bug , it was solved after upgrading the battery BMS firmware 

How did you upgrade the firmware. Do you have a link to the software upgrade and instruction

I have a vitor 3.6 kw 24v system 2, 200ah lifeo4 lithium batteries with 6- 410 watts 31v solar panels, recently I'm getting a bp error code, the system will beep twice and restarts. With both batteries on 100% and using only 200klw of power. How can I fix or what's the problem?