Hi Guy, Just watched your training video on BYD Premium 15.4. I'm just in the process of installing that battery with a Multiplus 5kw, MPPT 250/100 VE Can and a colour GX, I just wanted to double check whether I need a VE direct cable between the GX and the MPPT( I thought I read somewhere the 2nd VE can connection in the GX was only operational with a firmware upgrade???..I may be wrong here) Cheers Jon