Benefits of smart battery communicating with inverter Vs Voltage only

[doc3g]

I have noticed that the premium "smart" batteries (ex. EG4) have ethernet ports to communicate with the inverters and that various battery makers advertise that their batteries work with many different inverters. Hence, my questions are:

1. What information is communicated between the smart battery and the inverter?

2. How beneficial is having a smart battery versus one without communication?

3. Is it possible and/or cost-effective to modify a dumb battery to achieve similar benefits (for example, w/ a different BMS or a smart shunt)?

 

[JAS]

Just to add to this...

It appears (from reading many posts over the years and in my own experience) that the SoC from the BMS isn't very accurate on most (all?) LFP batteries and a good shunt should be used instead. So if that's the case, and closed loop communication with the Inverter is all based on the BMS SoC, then is it really that useful? (I guess you can save on the cost of an external shunt )