Uncle Blazer said:
What are the benefits of running two batteries for someone who isnt powering extra audio equipment? What are the benefits vs the price to mod a new space for the 2nd battery?
If you are asking...then you do not need a 2nd battery and will not be able to justify the cost. There are a variety of benefits, but only if you need them. If you live in Alaska, you may just want a back-up on board. If you drive log trips, you may want a fridge. If you need external lighting, you may need the extra.
Not only will the cost of modding the new space be there, but the cost of the battery and the wiring and the isolator. Possibly you will do the big three upgrade or a better alternator.
It is definitely not a mod just to do a mod or because it seems cool to have. It is not going to be cheap or is it going to be easy to justify. Hence why you do not see those of us that have legitimate reasons for dual batteries having completed this yet.
It is far easier to put a 2nd battery inside the truck and most stereo guys go that route. I do not like that personally so I started this thread for ideas on how to get one under hood.