Hi I am an electromechanical engineer, I have work designing PV Systems before with solar panels of different brand(ex. JA Solar, AXITEC , Hyundai...) and different brands of inverters(ex. HUAWEI, SMA, SOLIS, Fronius Primo...)
I can give you a BOM with #panels with brand and model, #invertes with brand and model, the type of cables and the length, type of brakers, fuse...