Great write up and Pic's. Keep us posted on how it works?
I got if from Reddeen Marine for $39.Nice! Where did you get the fuse box?
The truck has a 130A alternator that was part of the tow package (http://www.toyota.com/tacoma/options.html ). I'm hoping that will do.Did you do anything with the alternator? Add an extra charging wire or grounding wires?
I had a dual battery setup on a previous vehicle. I used an Orion battery isolator. The only bad thing about dual batteries is the added load that it puts on the alternator. I had to get a new alternator every couple years.
Excellent writeup, thankyou for posting this. :clap: Where did you get the project box you used to mount the fuse block in?
Remember that the stock wiring is designed to handle the trucks stock electrical system, plus trailer lighting, and maybe some small accessories. If you add a substantial electrical load, then the stock wiring needs some upgrading. If you want to do it all properly.The truck has a 130A alternator that was part of the tow package (http://www.toyota.com/tacoma/options.html ). I'm hoping that will do.
I hadn't planned to replace the alternator wires - I've read about the "big three" but thought that was more of an overkill audiophile thing.
Does anyone know how to tell if the charging and alternator ground wires are up to snuff? I'm more concerned when I replace the OEM battery and add a winch.
You are absolutely right about the backup battery draining the starter battery. I got the wrong model isolator for this setup. It should have been a BIC-95150. Thanks for catching that!If you were to disconnect the positive wire from the aux battery and tested it with a volt meter, without the engine running, is there still 12v in the wire? If there is, anything connected to the aux battery will also drain the stock one.
Sorry if i'm wrong. Just guessing from what i see. Still very good work.
Thanks again arott!I used one from Radio Shack (6x4x2). There are better boxes out there but none were narrow enough to fit over the the top battery plate that I had already made.
Here are links to other sources for project boxes:
BTW all of the components are listed in the newbie thread I posted when I was looking for help with the plan. http://www.ttora.com/forum/showthread.php?t=63430
(I should make that more obvious in this post.)
Only thing I see wrong with this... is that you got the battery principles back asswards as far as which should be the starter and which will run the aux loads.Here’s my completed Dual Battery Project.
My goal was to install a second battery to use as a backup for the primary battery and as a power source for the after market accessories.
I plan to upgrade the OEM battery to an Odyssey PC1700 when I install the winch.
When I first set this up, I used the PC 925 as a "house battery" and as a backup to the OEM starter battery.Only thing I see wrong with this... is that you got the battery principles back asswards as far as which should be the starter and which will run the aux loads.
the PC1700 should be yer aux. battery for powering high load accessories like a winch or what not.
But you really don't want the winch or other high loads running off the starter or the battery wired in conjunction with the OEM ignition sys.
I also think that dual batteries should be as close to the same output and capacity so they will charge at the same rates.
but hell... what do I know.
I think what Dell means is you should be using the larger battery to power your big loads, and the smaller battery as the starter/'house' battery. For example, when you're winching, the winch draws power from the big, deep cycle battery, and the alternator charges the big battery without having to go through the isolator. The small battery basically will only be for the starter, since the isolator will join the batteries when the truck is running. That means that A) your accessories won't ever draw down your starting battery and B) because of that, not only would it be hard to kill the starter battery, it won't have the risk of damage from deep discharges.When I first set this up, I used the PC 925 as a "house battery" and as a backup to the OEM starter battery.
Later, I got the PC1700 and now power everything off it it. The PC925 is just a backup battery. This is a very standard setup.
So I'm not sure what is backwards...