Possible to add battery rack to existing system that already has Tesla Powerwall?

[Kdesign]

Hello all. My current system is a 10.4kW solar array, 2 Delta Solivia 5.2 TL Inverters with 2 Tesla powerwall batteries (Diagram Attached). Instead of paying 14k for another power wall I would like to add a server rack battery kit. Has anyone attempted this or does anyone know if this is even possible?

 

[mcdanton]

I basically have the same specs ,i am tied to the grid but no battery at all. mine is a 9kw solar system.. i just got a Sunpal Lithium 10 kwh battery (model PP - E1, and i am unsure how to add it. do i just connect it to the existing inverter? will it need a shutoff or is the Delta Solivia inverter a smart inverter. please help, i do not generate enough to cover my usage and whatever i send to the grid is lost.