u/Warm_Ad4380

I want to add a battery to my already existing system. I am looking at the Solar Edge battery (400v). My research says I also need plug in kit, and a communication upgrade card.
Is this correct, and how hard would it be for me to do this myself. I am very handy and have done small electrical jobs on my own home. Adding/wiring outlets and switches and running wire to circuit box and adding new circuit. Thanks in advance for any help.