Can it be useful to daisy chain all batteries in a NONE Closed Loop setup?

[fmeili1]

I try to understand if it would make sense or may it have advantages in an open loop setup (no BMS communication with inverters/chargers) if I daisy chain the batteries.

Some additional information about my setup:

• My setup consists out of 9x EG4-LL-V2 and 3x EG4-LL-S batteries - a total of 12 batteries with 60kWh
• I've decided not to go the closed loop way (if this is useful or not is a separate discussion).
• I've attached all batteries via separate RS485 cables to passive RS485 HUBs and also connected SolarAssistant (SA) via RS485 to one HUB. Monitoring via SA of all 12 batteries works great and if have no issues.
• Because SA can only monitor the EG4 batteries (via Modbus RS485 protocol) if the first battery starts at address #2. SA does not support the EG4 batteries with the so called "address 1 protocol" and therefore the fist battery needs to be at address #2, the next battery #3, etc.
• Currently neither my CAN ports nor my Battery-Comm ports are used

I ask myself, what would happen if I would daisy chain all my 12 batteries via the Battery-Comm ports (but still no closed loop communication)?

• Would all 12 batteries shutdown if just one would detect a failure (e.g. BMS over/under voltage, temp, current, etc.)?
• Would it be possible to just connect the first battery (address #2) to SA to be able to monitor all of them?
• Would it be possible to E-stop all 12 batteries by just connecting a separate "E-Stop button (or dry contact relay)" to the first Battery-Comm port? Btw. With a specific firmware the older EG4-LL (V2) models are also able to use the E-Stop feature - I've double checked that with EG4 support.
• Would a different monitoring solution (eg. Victron Cerbo GX) be able to monitor all batteries if just connected to the first battery's CAN bus port?
• Would configuration changes to the first battery (address #2) automatically replicated to all other batteries?
• Something else?

Any ideas?

 

[fmeili1]

No one?

It seems that no one in the forum has any idea about my questions?

Does anyone have the E-Stop mechanism of an EG4-LL-S battery working with an external emergency stop switch (not connected to an internal inverter RSD), like described in the manual (ideally without closed-loop-communication)?

 

[Quattrohead]

No but I don't see why it shouldn't work, it's just a 12 volt control signal.

 

[fmeili1]

No but I don't see why it shouldn't work, it's just a 12 volt control signal.

Is it just a switch (NO) which has to be connected between pins 3 & 6, like this on the first battery?


Or do I need to feed 12V between the pins 3 & 6 to trigger the emergency stop?