I currently have an 8kW SunSynk that I've hooked up and am switching to a 16kW SunSynk soon. I have 11kW of Solar panels and 6 x 5.12kWh CATL SunSynk batteries.
The cables the batteries came with are 25mm2 copper, and I can't seem to find any bigger than this.
So right now my inverter is set...