Hi,
I have a couple of SOK rack mounted batteries and used the params described here to configure them. I am able to connect to each battery individually using a serial cable connected to the master battery ot to both at the same time (using FF in the drop-down).
My setup:
- 3 * 3.3kWp strings connected to a RS 450/200 MPPT controller
- The MPPT is connected to a lynx Distributor which also connects to the 3 * Multiplus II 48/5000 inverters ruining three phase - 400V
- the batteries are connected via a lynx shunt to the distributor
- both batteries are connected with short 70sqmm cables, the positive of one battery and the negative of the other goes to the shunt.
- everything is controlled via CerboGX VE.Can, VE.Bus and BMS are connected to this.
- ESS is enabled on the system, and set to Optimized (without battery life) and minimum SoC is set to 0%.
- All cables are 70sqmm except the ones connecting the inverters which are 50sqmm
The issue I have is that the BMS cuts off the discharge at 13%. I've checked and double checked everything against the params provided by Dexter and the discharge does not go under 13%. The shunt gives a reading of 180Ah consumed and 7% SoC, but I have no idea if that is setup properly for these batteries.
The remaining Ah on both BMS'es is around 13Ah, so in sync with what I have displayed on the Cerbo. Also the cells are at around 3.2v with a 4-8mV delta between min and max cell voltages. This seems to be in tune with the 13% reading on the BMS.
Any ideas on what else can be done to get the last 13Ah to discharge?
Regards,
A.
I have a couple of SOK rack mounted batteries and used the params described here to configure them. I am able to connect to each battery individually using a serial cable connected to the master battery ot to both at the same time (using FF in the drop-down).
My setup:
- 3 * 3.3kWp strings connected to a RS 450/200 MPPT controller
- The MPPT is connected to a lynx Distributor which also connects to the 3 * Multiplus II 48/5000 inverters ruining three phase - 400V
- the batteries are connected via a lynx shunt to the distributor
- both batteries are connected with short 70sqmm cables, the positive of one battery and the negative of the other goes to the shunt.
- everything is controlled via CerboGX VE.Can, VE.Bus and BMS are connected to this.
- ESS is enabled on the system, and set to Optimized (without battery life) and minimum SoC is set to 0%.
- All cables are 70sqmm except the ones connecting the inverters which are 50sqmm
The issue I have is that the BMS cuts off the discharge at 13%. I've checked and double checked everything against the params provided by Dexter and the discharge does not go under 13%. The shunt gives a reading of 180Ah consumed and 7% SoC, but I have no idea if that is setup properly for these batteries.
The remaining Ah on both BMS'es is around 13Ah, so in sync with what I have displayed on the Cerbo. Also the cells are at around 3.2v with a 4-8mV delta between min and max cell voltages. This seems to be in tune with the 13% reading on the BMS.
Any ideas on what else can be done to get the last 13Ah to discharge?
Regards,
A.