Nismojunky Posted November 18, 2010 Share Posted November 18, 2010 i need some help im going to be running dual battery's i also want to run dual altys, what i want to do it have both altys charge the main battery and transfer power to the rear battery i want the rear battery isolated how can i do this most idolaters ive found or looked at said not to use the rear battery as a power source just as a backup for starting , i want to run my subs inverter and oba off the rear battery how can i do this? Link to comment Share on other sites More sharing options...
onefast87 Posted November 18, 2010 Share Posted November 18, 2010 im not sure that 2 alternators would be cost effective. here is my solution, on z31performance.com lots of people have tried many different alternators. the most common being a maxima 90amp, quest/villager 110amp and the 350z wich is somewhere around 110 amps i think. i personally did the quest alternator on my vg30, it was pretty much a bolt on affair and almost double the ammount of amperage. also in my stock pathfinder i run 15"PPI sub with an 800watt pioneer amp, and its worked great for the last 2 years. Link to comment Share on other sites More sharing options...
Nismojunky Posted November 18, 2010 Author Share Posted November 18, 2010 i have a 140A military alty coming and i brand new reman 90A i want to run both with the sound system thats going to be installed im going to need it plus with all the lights and winch i plan on having the extra juice will be needed Link to comment Share on other sites More sharing options...
Alkorahil Posted November 19, 2010 Share Posted November 19, 2010 i need some help im going to be running dual battery's i also want to run dual altys, what i want to do it have both altys charge the main battery and transfer power to the rear battery i want the rear battery isolated how can i do this most idolaters ive found or looked at said not to use the rear battery as a power source just as a backup for starting , i want to run my subs inverter and oba off the rear battery how can i do this? You cant run two independant alternators tied to the same system! you will fry both alternator regulators and probably all the electronics in the vehicle alnog with the wiring. Link to comment Share on other sites More sharing options...
sewebster Posted November 19, 2010 Share Posted November 19, 2010 You cant run two independant alternators tied to the same system! you will fry both alternator regulators and probably all the electronics in the vehicle alnog with the wiring. I would think that it MIGHT be possible to make it work somehow, but you'd need to be installing a bunch of isolating diodes etc. so you can insure that the alternators can't interact with each other etc. Probably not recommended unless you have a good handle on electronics! Link to comment Share on other sites More sharing options...
Nismojunky Posted November 19, 2010 Author Share Posted November 19, 2010 this is news to me ive set up a few dual altys in trucks one being a blazer never had any problems please ex-plane how it will fry everything? Link to comment Share on other sites More sharing options...
adamzan Posted November 20, 2010 Share Posted November 20, 2010 You cant run two independant alternators tied to the same system! you will fry both alternator regulators and probably all the electronics in the vehicle alnog with the wiring. Why not? Magregor did it on his wd21 and had no problems. So did another member near me. Robb PM magregor or pathie4me, they both live in ottawa and have done dual alternator installs. Link to comment Share on other sites More sharing options...
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