Alternator for dual batteries

[nero]

I am going to put dual batteries in my truck, will the alternator charge both of them as well as it did with just one or do I have to get a more powerfull alternator. If so, what kind of alternator fits?

 

[ld50]

I put a dual battery in my rig and kept the stock alternator. It is not a problem unless you are running a ton of high drain items while your engine is running.

Check my mod thread for a good write up on how I did mine, if you are still planning it out, it may help you.