Protect your RAM truck’s starter battery while powering accessories. True® RAM® Dual battery isolator kit offers smart charging, rugged build, and hassle-free install for RAM 1500, 2500, or 3500.
If you’re outfitting a RAM® truck for heavy-duty electrical needs—like winches, auxiliary lighting, or camping gear—a True® RAM® dual battery isolator becomes a smart upgrade to protect your starting battery while powering accessories
A dual battery setup for RAM® 1500 is useful addition especially for individuals who utilize their vehicles for off-road excursions, camping, or using high-power accessories and equipment. Here’s an outline of what a dual battery kit is, its advantages, and what to search for when selecting one for your Ram 1500 or 2500
We can lead you throughout the whole process of installation of the RAM® 1500 dual battery kit, including a fundamental wiring diagram. Keep it in mind that specific procedures may vary depending on the make, year and precise configuration of your RAM® , so if you’re unclear, consult the user manual or get professional advice of TrueAm staff.
Why True® is better than other leading brand?
The True® Dual Battery Isolator consistently outperforms many known brands thanks to its smart engineering, rugged reliability, and vehicle-specific design. Here’s how it stacks up:
Components of a RAM 1500 Dual Battery Kit
- True® Smart Battery Isolator fit for all Ford Truck models
- 20 feet #6 high flex red cable with tinned copper cable lugs
- 3 feet #6 high flex black cable with tinned copper cable lugs
- 2 positive brass alloy battery terminal ends
- 1 negative brass alloy battery terminal end
- 3 loose crimp-on tinned copper cable lugs
- 2 sections of adhesive lined shrink tube
- 5 zip ties
- 1 – Ford® dual battery kit installation booklet
- Ford® dual battery setup diagram included
- Optional dual display voltage meter
- Visit our shipping, return and warranty policies for details!
Why Use True® Heavy-duty Dual battery isolator for RAM?
| Feature | True SBI | Redarc SBI12 | Victron Cyrix CT |
|---|---|---|---|
| Voltage Drop | None | Minimal (~0.01–0.1V) | None |
| Dual Sensing | Yes | Yes | Yes |
| Delay Feature | 10 sec smart delay | Yes (voltage-based) | Yes |
| Mounting Options | Compact, adhesive or screw | Larger, needs more space | Larger, relay-style |
| Price Range | ~$65–$90 | ~$165–$325 | ~$115–$140 |
| Best Use Case | UTVs, off-road, compact rigs | Overlanding, RVs, trucks | Marine, RV, solar setups |
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How to setup dual batteries in RAM?
Setting up dual batteries in a RAM truck is a fantastic way to power accessories like winches, fridges, or inverters without risking your starter battery. Here’s a step-by-step guide to help you get started:
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🔧 Dual Battery Setup for RAM Trucks
🛻Step 1: Choose Your Battery Location
Depending on your RAM model (1500, 2500, etc.), you have a few options:- Engine Bay: Ideal if space allows. May require relocating the air intake.
- Truck Bed: Use a weatherproof battery box. Great for overlanding setups.
- Cabin (under/behind seats): Common in eTorque models or custom installs.
Step 2: Select Your Batteries
- Use matching batteries (same type and capacity) for best performance.
- Consider deep cycle AGM or lithium for auxiliary use.
Step 3: Install a Battery Isolator or DC-DC Charger
This prevents your starter battery from draining when accessories are in use. Use original True® Heavy-Duty Battery Isolator
Step 4: Wiring Essentials
4 AWG or thicker cable- Inline fuses (100–150A) near each battery
- Ground wires to chassis
- Cable sheathing for protection
- Mounting hardware for isolator and battery tray
Step 5: Installation Overview
- Mount second battery in chosen location.
- Connect positive terminals through isolator or DC-DC charger.
- Ground both batteries securely.
- Fuse the lines close to each battery.
- Test system with a voltmeter to confirm isolation and charging.
Optional Add-ons
- Solar panel with charge controller for off-grid charging
- Dual Voltage Meter monitor to track voltage and health
DODGE RAM dual battery wiring diagram
RAM 1500 dual battery setup tips:
- Safety First: To avoid electrical shocks, disconnect the primary battery before beginning installation.
- Follow the Instructions: For the best results, follow the installation manual with wiring diagram included with the Ram 2500 dual batter kit.
- Secure Mounting: Make sure both batteries and other components are properly installed to prevent damage during vehicle operation.
- True Professional Assistance: If you are not familiar with electrical systems, consider dialing a True technical staff for advice on the setup of the Dodge Ram Battery Isolator kit.
Where is ram 1500 auxiliary battery location?
In the RAM 1500, the auxiliary battery—also referred to as the secondary or 48V battery in eTorque models—is typically located in a less obvious spot than the main battery.
🔍 Here’s where to look:
- For eTorque-equipped RAM 1500s, the auxiliary 48V battery is usually mounted behind the rear seat or under the rear seat on the driver’s side. It’s paired with a 48V motor generator and a small lithium-ion battery pack that supports fuel-saving features like auto start-stop and torque assist.
- In custom dual battery setups, owners often install the second battery:
- In the engine bay, by removing or relocating the stock air intake
- In the truck bed using a battery box
- Under the cab or behind the rear seats, depending on space and safety considerations
If you’re planning to install or access the auxiliary battery yourself, be cautious—especially with the 48V system. It’s best to consult your owner’s manual or a certified technician to avoid electrical hazards.
How to install True® Battery Isolator? – visit here
- Good news, and don’t worry, our dodge ram 1500 dual battery setup still works with the Dodge RAM 2500 or 3500, regardless of the year model.
- 2017 marks True ‘s sixth year of offering dual battery system technology to dealers across California, Missouri, Texas, Arizona, Florida, and New York.
What are the Advantages of Having a Dodge RAM Dual Battery System?
Electrical availability:
- Auxiliary Power: With Dodge RAM dual battery system, you can auxiliary battery exclusively for use of accessories such as mobile charger, source of sound power, winches, freezers, extra-lights, and inverters without depleting the primary battery.
- Prolonged Consumption: RAM dual battery setup offers more power for camping vacations, off-road activities, or working in isolated areas.
Better Endurance:
- Engine Starting: The dodge ram 1500 dual battery setup ensures that the main battery is always supplied to start the engine, lowering the likelihood of becoming stranded with a battery that fails.
- Emergency Electricity: If the primary battery fails, the second battery can be used to provide backup power.
Increased battery lifespan:
- Load Distribution: Spreads the electrical load across two batteries, lowering pressure on both and perhaps increasing their lifespan. Yes having a dual battery setup with isolator is actually a budget saver.
Multiple uses:
Multiple Applications: Excellent for truck, RVs, watercraft, and other purposes requiring dependable power.
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