I have been on several threads already regarding lithium upgrade. I have upgraded my solar from 2 x 100 to 4 x 100 panels , wired them in series, parallel and fitted a Victron 100\30 mppt regulator. Taking things in stages , I have mounted a Renogy 2000w inverter, a Victron 30A mains charger and a Victron 30A B2B. I now need to wire it all up. The solar input is wired into original solar input with an increase in inline fuse from 15A to 20A. Now onto mains charger which i will wire into battery output wires through victron shunt on negative lead. The factory fitted psu is a BCA unit with daul outputs. Do I disconnect the charger output on this unit , or remove charger fuse as this is not needed and is not lithium compatible. Is it not as simple as that. I would appreciate the views of the forum members. Thanks.