I would like to install a second battery to my house.

How does it work to connect it to Givenergy app?
Do I need it to call for connection or it does automatically?
Thanks

As part of the commissioning process for the second battery your installer will configure the inverter so that it controls the addition. Once working the inverter will automatically report the full expanded system.

So if I install the battery myself and connect it to the existing one the info from the second battery will automaticaly report to my installer(The one who installed the first one)? Do I need to call them or they will expand the additional one? Thanks

bgitev Warranty void on both batteries by the look of things, the install needs to be installed and commissioned by a GE qualified person.