Custom PCB - https://www.pcbway.com/project/shareproject/Audi_Q5_13s_Battery_Module_BMS_replacement_Board_3b43940a.html
Audi Modules - https://jag35.com/collections/new-arrivals/products/48v-audi-q5-phev-modules-zero-miles-samsung-cells
6.5kW 48v inverter - https://amzn.to/3DDFRsX