I have a 2000 xj running a 20 inch light bar 2 Baja offroading lights 2 12 inch subs and soon a 40 inch light bar my question is if I mount a second battery will my alternator be able to charge it I just installed a rebuilt Wilson professional series alternator yesterday oem please help

 

It depends on the amperage of your alternator but it will probably work just fine. You have to install a dual battery isolator, though.