I run dual PC1200 Odyssey batteries on my 1992 FJ80. I manage the power with a Hell-Roaring battery isolator. Keeps one battery hot for starting and second battery for backup. love my system. about to change it though- converting to a 4BT Cummins 
Dual Alternators for Dual Battery Setup
- Thread starter FloridaFJ80
- Start date
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Hi, where can I get the bracket on the picture to install the alternator there? Thanks
Before I decide on the best route for my dual battery setup would be, i wanted to bring the idea of dual alternators for discussion.
Mainly what I am trying to achieve is the following:
- Seperate the OEM electronics from the added Accessories
- Dont want to make any changes to OEM electronics schema
- Retain factory functionality
- Be able to run all accessories on second battery and be able to drain battery and be able to start vehicle from main battery
- Be able to jump the main battery in case of discharge with jumper cables
- In the event the main alternator goes, be able to charge main battery with second alternator
While camping I like to have the radio on, and I plan on having a nice audio setup with amp and subwoofer. One of my concerns is since I dont want to make any changes, will the headunit draw enough power to eventually drain the main battery. All AMP's will be powered from second battery. Assume both batteries are Optima Yellow tops.
In case of a Main battery drain, how could I from the cabin jump start the battery? I dont want to use jumper cables.
Is there a way to charge the main battery from the second alternator, in the event the main ALT craps out, without unhooking and moving anything, a complete High availability redundant alternator system at the flick of a switch? Is this even possible?
I think the benefits are interesting, if you could have a fully redundant charging system.
Any ideas?
Tapage
Club 4X4 Panamá
I used to see those in Venezuela ..
The sooner the battery dies the happier the rest of the campers with in a mile radius will be. I say keep it stock 
The sooner the battery dies the happier the rest of the campers with in a mile radius will be. I say keep it stock
What he said x 2.
I've driven a hundred miles with a bad alternator. Just turn off everything and pray. It would suck at night.
