Anern 10.2kW Hybrid Solar Inverter Instal. There Things I don't Like & Don't Understand

I will just be clear from the start lol, I still consider myself in the Novice Catagory for all things electrical, Spanners and Hammers that's me so please be gentle in the comments 🤣. There is a growing list of things I don't like and don't understand. The "AC IN" of the inverter has a L, N And Earth/Ground terminal but the "AC OUT" has a L, N and the Earth/Ground is off earth point on the metal case of the inverter. 🤔 When the Daly BMS os off, discharge and charge switches are off I still get a voltage at the output P- of the BMS of aroud 45v tje pack voltage is around 53v. If I turn on the discharge switch the BMS P- Output shows 53v, will currant still flow at 45v with the BMS switches off??? I need some brave pills!!! ⚡💥😢 I now don't like the look of how the AC out cable is so close to the DC PV cables. Do I need to worrie about Induction and Eddie Currents? Progress is Glacial, life is getting in the way but I will get there. Look after yourselves Cheers Gaz