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

 

Are you down Under?

JK..
How do you like your light bar? I'm looking for one for my son's 01 Cherokee.
What did ya pay if you don't mind me asking?
I see such a wide range of prices that not sure what to get.
Don't want it to poop out after a year?

Thanks and welcome
E

 

I paid 40 on sale for 20 inch originally 150 and 60 for 40 inch on sale originally 250 I love them very very bright lights up 30 yards easily

 

Why are you considering adding another battery?
Your alternators job is to carry all of the loads on your jeep while it is running. The battery gets the engine started and provides a boost when needed. ( too heavy a load for the alternator, alternator cant react fast enough, rpms too low to generate enough output, ect) So if your alternator is not keeping up now with the current loads you are placing on it adding a second battery will only buy you run time before the voltage starts to fall off. It will only be able to recharge both batteries if you give it ample time with spare amperage to do so.
so what is your alternators output?
how well is it keeping up or not?