Chargeverter Communication withe LifePower4 V2

[JustFloyd]

I just got an EG4 chargeverter, and am charging my rack batteries one at a time to try to get them all to the same SOC or voltage level before connecting them all together. My issue is that I cannot get coms working between the battery and the chargeverter. I've plugged the data cable into all four ports on the battery and the chargeverter still says lost. All of the batteries currently have dip switch 1 down and the rest up for protocol and they are all up for the battery id settings. I am charging to voltage now and it works, but I'd like to have the communication working. Any suggestions?

 

[JustFloyd]

OK I partially got this working. I had tried the id dip switch with #1 down and the rest up but there was still no communication. Afterwards I shut he battery off for a bit while I researched. When I turned it back on, the chargeverter was communicating! It showed 83% soc. I set the low soc limit to 90% and the max charge rate at 25A. The chargeverter ramped up to the 25A limit and stayed there, however voltage only read .5 It appears to be charging, as I stood there looking the soc increased to 84% but why does the voltage read .5?

EDIT: Just checked SOC up to 91% voltage still says .5 Measured volts at the battery was 54.2 now 55v, so it is charging, but the chargeverter only shows .5V at 25.3A Before I got coms working and it was just working off of voltage it showed the correct output. After coms setup it stopped.

 

[marionw]

The CV-GC communicates with the battery using pins 1 & 2 (at least for the EG4 LifePower4 V1)
Not sure if the CV-GC communications works with any EG4 battery except the EG4 LifePower4 V1.
With the V2 you might have to make a special cable that only uses pins 1&2 and the V2 has to be set as the Master as the commands sent by the CV-GC (Master on the RS485 bus) sends commands that only a "Master BMS" will respond to and for the V1, pins 1&2 are a Slave RS485 bus.

The SOC Start and SOC Stop was well as the Bat Start and Bat Stop only control the "Dry Contacts" of the CV-GC. They have no effect on the CV-GC charging nor do they start or stop the CV-GC charging. As long as the CV-GC has input AC power it will charge regardless of the SOC Start, SOC Stop, Bat Start and Bat Stop.

The CG-GC Voltage and Current settings will determine the charge process. If for example you set the Voltage to 56 and the Current to 10 amps, the CV-GC will ramp up the Voltage until either the Voltage or Current limit is reached, whichever one occurs first. When initially charging a low battery the CV-GC will ramp up the voltage until the charge current setting is reached and will hold this voltage/current (Constant Current Charging) until the battery charge gets close to the CV-GC Charge Voltage setting (current starts to decrease) at which time the charge will shift to Constant Voltage and the charge current will slowly decrease until the battery voltage reaches the CV-GC Voltage settings.

 

[JustFloyd]

Last update unless anyone has some ideas of what is happening, or suggestions on how to figure out what is happening. Just checked again, chargeverter was showing .2v at 25.2A SOC was at 98%. Shut the battery breaker off then the bms. Chargeverter was now show 57.0V at 0A. Battery voltage was 55.4V. Unplugged the chargeverter. Moved the cables to the next battery. Turned on the bms, then the breaker and finally the chargeverter. Coms were working, this battery is 54% SOC. Charge rate was .5v at 25.4A This was about 10:40am going to see how long it takes to charge and monitor the process.