Photovoltaic Battery Storage - Market Check Fire Hazard

The BYD Battery-Box Premium HVS 7.7 is an LFP storage system. How can I find out if I can also connect it on the AC side? I have something in mind that it only works on the AC side with us and not on the DC side.

On the AC side, it means per battery inverter, that is the standard. I have a BYD HVS 10.2 with SMA SunnyBoyStorage in the basement.

The storage we are planning consists of lithium-titanate cells (LTO). They do not catch fire even when mechanically damaged and are fully functional at -40 degrees. Disadvantage: capacity per volume is poor and price is high.

I built my storage in the garage …. It is not connected to the house. He can burn it down there if he wants (-;

Is the garage heated, that is warm and dry enough?

Frost protector …and the attic is insulated … a garage doesn't get that cold anyway … besides, the attic is designed for that

Or do you then put your electric car inside the house or how is that supposed to work?