Complete Off Grid Engineering dual battery system

**SOLD** I am trading in my truck, and therefore I'm selling my complete dual battery system for a 2nd or 3rd generation Tacoma. This is the Off Grid Engineering "split system," which locates the second battery near the passenger side firewall.

The kit includes the following items: an aluminum primary battery tray (which also serves as a mounting point for the Blue Sea ACR relay) with heavy duty aluminum tie down bracket, an aluminum passenger side aux battery tray with heavy duty aluminum tie down bracket, a Blue Sea 7622 ML-ACR 500 amp dual-voltage sensing relay (the "brain" of the whole operation), and all of the necessary wiring, fuse blocks, terminals, and connectors. I will also include a really nice digital dual voltage meter with a blue display, which I had shipped from Australia. The meter fits into the OEM "small" switch cutout, and has a beautiful blue illumination that is not overwhelmingly bright and looks great against the OEM interior illumination of the 3rd generation Tacomas.

The major advantage of this "split" system (vs. the other systems that place two batteries in the OEM location) is that it better distributes the weight of the batteries. This minimizes the impact of the "taco lean," while also preventing too much stress being applied to the sheet metal around the front driver side fender. It also preserves the space around the headlight to ease with changing bulbs, and it avoids any potential contact between the batteries and the oil filler spout. However, this kit is only compatible with the TRD Off-Road or TRD Pro models, as their ATRAC traction control system replaces the ABS control module that would normally be in the location where the second battery tray goes. This kit is not compatible with the TRD Sport, SR5, or base model Tacomas.

The system works by sensing voltages that come from both batteries to the ACR. When there is a higher voltage detected on either input for a specific amount of time, the relay closes the circuit. This means that both batteries are connected in parallel while the engine is running, and both are charged by the alternator. When the ACR relay detects a drop in voltage from either input (when the engine is turned off and the alternator is no longer providing electricity), it opens the circuit, which isolates the two batteries from one another. At that point, anything that is connected to the second battery (camping fridge, lights, USB chargers, etc.) can operate without draining the voltage of the primary/starting battery. To make things easy, most folks who run a setup like this simply install an aux fuse box that is connected directly to the second battery, and then connect all accessories directly to that fuse box.

Because the alternator treats both of your batteries as one big battery while the relay is closed, this system is designed to be used with matching Group 35 batteries. The advantage of this design (vs. a DC to DC charger setup) is that the two batteries act as one large battery when the relay is closed, which is great for performing a heavy load application like using a winch or jump starting a large vehicle. There is also a manual selector switch on the ACR, which allows you to override the automatic/voltage sensing functionality to jump start your own vehicle off of your aux battery, or to "lock out" the aux battery from the alternator for any reason. The only disadvantage of this ACR-based system (vs. a DC to DC charger setup) is that the charging of your batteries is limited by the output voltage of your factory alternator. Most aftermarket AGM batteries are designed to be charged at a higher voltage (note: this is no different than if you installed a single AGM battery like an Odyssey or Optima into your Tacoma without this dual battery kit). Therefore, if you do run AGM batteries, it is a good idea to either charge them manually with an external battery charger at least once per month, or to have your alternator output voltage increased via a software tune. I had a KD Max tune performed, and the tuner increased the alternator output voltage to 14.4 volts. That voltage is more than enough to keep the batteries healthy, but for added benefit, I would also connect an inexpensive battery charger to the batteries at least once per month, which topped them back of to 14.7 volts and kept them very healthy and happy (I used a CTEC 7002 model charger).

This kit sells new for $899, and can be found here: https://www.off grid4x4.com/collections/complete-dual-battery-systems/products/2005-current-toyota-tacoma-trd-off-road-trd-pro-complete-dual-battery-system (copy/paste the link, but remove the space between the words "off" and "grid" - apparently OGE and Tacoma World don't play nice anymore, so I can't directly link the system). All components are in great shape, and all mounting hardware is included. **SOLD**

 

So $550 + my factory battery?

 

Yes. That would get you the full kit, including my 2 AGM batteries.

 

Deal, Sending a PM.

 

Interested. Second in line.

 

Interest if this falls through. Have a red-top to trade with as well

 

Sold