Ram 1500 REV Range Extender: Deep Dive into the 92-kWh Battery and Generator System
You’re sitting at a job site, the Ram 1500 REV silently idling—well, not really idling because there’s no engine running. The Pentastar V6 under the hood isn’t connected to the wheels at all. It’s just there, humming occasionally to keep your 92-kilowatt-hour battery pack topped up while you run power tools from the truck’s onboard outlets. This isn’t your grandfather’s pickup, and it’s not even your neighbor’s hybrid. It’s something entirely new.
TL;DR
The Ram 1500 REV’s range-extender system pairs a liquid-cooled 92-kWh battery pack with a 130-kilowatt generator driven by a 3.6L Pentastar V6 engine . This series hybrid setup means the gasoline engine never drives the wheels—it only generates electricity to recharge the battery or provide extra power to the electric motors when needed. The result is a targeted 690 miles of total range, with 145 miles of all-electric driving before the generator kicks in . The system delivers 663 horsepower, 615 lb-ft of torque, and maintains full 14,000-pound towing capacity without the range anxiety typical of pure EVs .
Key Takeaways
- 92-kWh gross battery capacity with approximately 70.8 kWh usable—reserving capacity for longevity and performance
- 130-kW generator converts Pentastar V6 mechanical power to electricity, with the ability to boost power to the motors when needed
- 145-mile all-electric range covers most daily driving needs without burning a drop of gas
- 690-mile total range eliminates range anxiety for long hauls and towing
- 400-volt architecture with 145-kW DC fast charging adds 50 miles of range in 10 minutes
- 7.2 kW of exportable power for tools, camping, or emergency home backup
Understanding the Ram 1500 REV Powertrain: How the Range Extender Actually Works
Here’s the thing about the Ram 1500 REV—it’s not a hybrid in the traditional sense. Most hybrids you see on the road today are parallel hybrids, where both the gas engine and electric motors can turn the wheels. The Ram 1500 REV uses a series hybrid architecture, also called an extended-range electric vehicle (EREV) .
Think of it like a diesel-electric locomotive. The massive diesel engine on a train doesn’t turn the wheels—it runs a generator that powers electric motors connected to the axles. The Ram 1500 REV works the same way, just on a much smaller scale.
The 92-kWh Battery Pack: Heart of the System
At the core of the Ram 1500 REV sits a liquid-cooled 92-kilowatt-hour lithium-ion battery pack . This isn’t the same battery you’d find in a pure EV like the canceled all-electric Ram 1500 REV, which was planned with 168-kWh and 229-kWh options . The range-extender version uses a smaller pack because it doesn’t need to store all its energy onboard—it carries a generator to make more.
The gross capacity is 92 kWh, but the usable capacity is approximately 70.8 kWh . Automakers do this with every EV and hybrid—they reserve a portion of the battery capacity at the top and bottom to extend battery life, ensure consistent performance, and prevent damage from completely draining the cells.
Battery Specifications at a Glance
| Specification | Value |
|---|---|
| Gross Capacity | 92 kWh |
| Usable Capacity | ~70.8 kWh |
| Cooling | Liquid-cooled |
| Chemistry | Lithium-ion |
| Voltage Architecture | 400V |
Italic: The usable capacity of 70.8 kWh is what actually powers the wheels—the rest is buffer to protect battery health and ensure consistent performance over the truck’s lifetime.
The 130-kW Generator and Pentastar V6: Range Extension Explained
Paired with the battery pack is a 130-kilowatt generator driven by a 3.6L Pentastar V6 gasoline engine . Here’s where the magic happens.
The Pentastar V6 doesn’t care what speed you’re driving. It doesn’t need to rev up when you pass someone or lug along when you’re crawling through a job site. Instead, it operates in its most efficient RPM range, spinning the generator to produce electricity. That electricity flows to one of three places:
- Directly to the electric motors to turn the wheels
- To the battery pack for storage and later use
- A combination of both, depending on demand
When you need maximum power—say, merging onto the highway with a heavy trailer—the generator can actually increase power to the motor and gearbox beyond what the battery alone can provide . This gives you the best of both worlds: the instant torque of electric motors plus the sustained power of a gasoline engine working at peak efficiency.
“The 3.6L Pentastar® V6 engine generates mechanical power, which is converted to electrical power by the onboard generator for maximum efficiency. The generator can also increase the power to the motor and gearbox when serious power is needed.”
Performance Numbers That Matter
With this setup, Ram is targeting impressive performance figures :
- Total system horsepower: 663 hp
- Total torque: 615 lb-ft
- 0-60 mph: 4.4 seconds
- All-electric range: 145 miles
- Total range: 690 miles
- Fuel tank capacity: 27 gallons
- Max towing: 14,000 lbs
- Max payload: 2,625 lbs
The 27-gallon fuel tank gives you serious range when the generator is running . Combined with the 145 miles of pure battery range, you’re looking at over 600 miles of additional range from gasoline—enough to tow a trailer from dawn to dusk without stopping for fuel.
The STLA Frame Platform: Engineering Behind the Battery
The Ram 1500 REV rides on Stellantis’ new STLA Frame platform, designed specifically for large body-on-frame electric vehicles . This platform is flexible enough to accommodate multiple powertrain types—battery electric, range-extended electric, hybrid, and potentially even hydrogen fuel cells in the future .
Platform Specifications
The STLA Frame platform offers impressive capabilities :
- Vehicle length range: 216 to 234 inches
- Maximum ground clearance: 10.3 inches
- Water fording depth: Up to 24 inches
- Charging capability: Supports 800V architecture (though Ram 1500 REV uses 400V)
- Bidirectional charging: Built-in capability for vehicle-to-home, vehicle-to-grid, and vehicle-to-vehicle power transfer
For the Ram 1500 REV, the platform houses the 92-kWh battery pack low in the frame, which lowers the center of gravity and improves handling compared to traditional body-on-frame trucks. The independent rear suspension, with standard air suspension on the REV, further improves ride quality and load leveling .
Why 400V Instead of 800V?
You might notice that the canceled all-electric Ram 1500 REV was planned with 800-volt architecture and 350-kW charging . The range-extender version uses 400-volt architecture with 145-kW DC fast charging .
There’s a simple reason for this: the range-extender doesn’t need ultra-fast charging. With the onboard generator, you’re never dependent solely on public chargers for long trips. The 400-volt system is simpler, lighter, and less expensive—cost savings that can be passed to buyers or invested in other features.
That said, 145 kW is still plenty fast. Ram says you can add 50 miles of all-electric range in about 10 minutes at a DC fast charger . That’s enough to get you home or to your destination if you want to maximize electric driving.
Charging and Power Export: More Than Just a Truck
The Ram 1500 REV isn’t just about moving people and cargo—it’s a mobile power station.
Charging Options
The truck supports three levels of charging through a smart charging port with a lockable, weatherproof enclosure :
| Charging Level | Voltage | Use Case |
|---|---|---|
| Level 1 | 120V | Overnight charging at home or job site with standard outlet |
| Level 2 | 240V | Dedicated home charger or public Level 2 stations |
| Level 3 DC Fast | 400V up to 145 kW | Public fast charging—adds 50 miles in ~10 minutes |
The Free2move Charge App provides access to a large network of public charging locations, with the ability to locate, activate, and pay for charging sessions from your phone .
Bidirectional Charging Capabilities
Here’s where the Ram 1500 REV gets really interesting for work and life. The truck supports bidirectional charging, meaning power flows both ways :
- Vehicle-to-load (V2L): Up to 7.2 kW of exportable power from the truck bed, with an available power panel
- Vehicle-to-home (V2H): Power your house during outages—Ram claims up to 30 days with device power rationing
- Vehicle-to-vehicle (V2V): Charge another EV in an emergency
- Vehicle-to-grid (V2G): Potentially feed power back to the utility grid (future capability)
The bed-mounted outlets provide up to 4.8 kW, while an available power panel boosts that to 7.2 kW . That’s enough to run power tools, a camper, or essential home appliances during an outage.
When the grid is down, this electric truck can help get you back up and running for up to 30 days with device power rationing.
Frunk Storage and Power
The front trunk (“frunk”) offers 425 liters (0.4 cubic meters) of lockable storage space with a power-operated lid . An available 3.6-kW power panel in the frunk provides additional outlet capacity, letting you run tools or charge devices while keeping your bed free for cargo .
Drive Modes and Regeneration: Controlling the Power
The Ram 1500 REV offers multiple drive modes that let you tailor how the battery and generator work together .
Available Drive Modes
- Electric+ Mode: Powers the truck using only battery energy, with the generator kicking in only when needed
- E-Save Mode: Preserves battery charge by controlling when the generator engages—useful if you want to save electric range for later (like entering a zero-emission zone)
- Eco Mode: Prioritizes efficiency and reduces climate control output to save power
- One Pedal Driving Mode: Brings regenerative braking to the forefront—when you lift off the accelerator, the truck slows down and captures kinetic energy to recharge the battery. This can provide added peace of mind in traffic and maximize efficiency
The regenerative braking system is adjustable, letting you choose how much deceleration you get when lifting off the throttle. This is a first-of-its-kind feature for the Ram brand .
EV-Specific Information Displays
The Ram 1500 REV keeps you informed with EV-specific data through multiple displays :
- 12-inch driver information digital cluster: Shows battery level, energy flow, and range estimates
- 14.5-inch Uconnect 5 touchscreen: Displays charging locations, energy usage history, and charging status
- Available 10.25-inch passenger interactive display: Lets your copilot navigate, stream content, or monitor trip data
- Available head-up display: Projects key information like speed and navigation onto the windshield
The systems use full-color 3D graphics to show energy flow—where power is coming from, where it’s going, and how much range you have remaining .
Real-World Implications: What the Numbers Mean for Owners
Let’s move beyond the specs and talk about what this actually means for someone who buys a Ram 1500 REV.
Daily Driving: All-Electric, Every Day
With 145 miles of all-electric range, most owners will rarely use gasoline . The average American drives about 40 miles per day. That means you could drive Monday through Friday, plug in overnight on Sunday, and never burn a drop of gas during the workweek.
For fleet operators, this is huge. Delivery routes, service calls, and job site visits that fall within 70 miles of home base can be completed entirely on battery power. The generator becomes a safety net for longer days or unexpected trips.
Towing: The Real Test
Electric trucks have a dirty secret: towing cuts range dramatically—often by 50% or more. With a pure EV, that 300-mile range becomes 150 miles when you’re pulling a trailer. Suddenly, that weekend camping trip requires careful charging planning.
The Ram 1500 REV solves this. When you hook up a 14,000-pound gooseneck trailer, your range doesn’t collapse—it just starts using the generator sooner . You might only get 100 miles from the battery while towing, but with 27 gallons of fuel in the tank, you’re not hunting for chargers. You’re pulling into any gas station, just like you do now.
Always check your trailer weight and hitch rating before towing heavy loads. Even with 14,000 pounds of capacity, proper setup matters.
Job Site Power
For contractors, the exportable power might be the killer feature. Imagine pulling up to a job site where the power hasn’t been run yet. You plug your saws and compressors into the truck bed outlets and work all day. The truck’s generator fires up occasionally to keep the battery charged, but you never hear a loud, smelly gas generator running nearby.
With 7.2 kW of exportable power, you can run:
- Multiple power tools simultaneously
- Lighting for evening work
- Compressors and welders
- Charging stations for cordless tool batteries
- A coffee maker and lunch setup for the crew
Home Backup
Hurricane coming? Ice storm in the forecast? The Ram 1500 REV can power your home for days . With careful power management—running only essentials like refrigerators, furnaces, and lights—Ram claims up to 30 days of backup power from a full tank of gas and charged battery.
That’s peace of money you can’t put a price on.
Frequently Asked Questions
What is the difference between the Ram 1500 REV range-extender and the canceled all-electric REV?
The all-electric Ram 1500 REV (canceled) was a pure battery EV with 168-229 kWh batteries and no gas engine . The range-extender REV (coming 2026) pairs a 92-kWh battery with a Pentastar V6 generator—the engine never drives the wheels, only makes electricity .
How much all-electric range does the Ram 1500 REV have?
Ram targets 145 miles of all-electric range from the 92-kWh battery pack before the generator engages .
What is total range with the generator?
The targeted total range is 690 miles, combining battery power with the 27-gallon fuel tank feeding the generator .
How fast can I charge the battery?
With 400-volt DC fast charging at up to 145 kW, you can add 50 miles of range in about 10 minutes . Level 2 charging at 240 volts handles overnight charging, and Level 1 works with standard outlets.
Can I power my house with this truck?
Yes. The Ram 1500 REV supports bidirectional charging, including vehicle-to-home power. With careful power management, Ram claims it can power essential home systems for up to 30 days .
How much can the Ram 1500 REV tow?
The targeted maximum towing capacity is 14,000 pounds when properly equipped .
What is the 0-60 mph time?
Ram targets 4.4 seconds for the 0-60 mph sprint, thanks to 663 horsepower and instant electric torque .
When will the Ram 1500 REV be available?
Projected availability is 2026 .
What is the fuel tank size?
The Ram 1500 REV carries a 27-gallon fuel tank for the range-extending generator .
Does the Ram 1500 REV have RamBox?
Yes, the class-exclusive available RamBox Cargo Management System carries over, with lockable, weatherproof storage bins integrated into the bed walls. The driver-side bin includes a 115-volt 400-watt auxiliary outlet .
The Bottom Line: Why the Range-Extender Changes Everything
Here’s the thing about electric trucks—they’ve always faced a chicken-and-egg problem. Buyers want enough range to tow and haul, but bigger batteries are heavy and expensive. Charging infrastructure isn’t where it needs to be for long-distance towing. And nobody wants to be that person hunting for a charger with a 30-foot trailer in tow.
The Ram 1500 REV’s range-extender system sidesteps all of these problems. It gives you:
- Electric driving for daily use—silent, efficient, zero-emission
- Generator backup for long trips—no range anxiety, no charging stress
- Full towing capability—14,000 pounds, same as the gas trucks
- Exportable power—7.2 kW for tools, camping, or emergencies
- Gas station compatibility—fill up anywhere, anytime
It’s not a compromise. It’s the best of both worlds wrapped in a package that looks, feels, and drives like a Ram truck should.
The 92-kWh battery gives you enough electric range for most days. The 130-kW generator gives you unlimited range for the days you need more. And the whole system is engineered to deliver the capability Ram owners expect, without asking them to change how they use their trucks.
Would you consider a range-extended electric truck for your fleet or personal use? Does the 690-mile range ease your concerns about going electric? Drop your thoughts in the comments below.
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