An Edison Motors diesel-electric pickup truck successfully towed an 8,000-pound Airstream camper on public roads, demonstrating the viability of its series-hybrid powertrain. The truck, dubbed the ReCharger, began as a 1995 Dodge and now features electric axles powered by a diesel generator. This milestone follows earlier tests where the vehicle moved under its own power, though it has since evolved into a drivable prototype that passed safety checks.
The ReCharger’s powertrain combines a smaller Cummins R2.8 four-cylinder diesel engine with a 60 kilowatt-hour battery pack. The diesel engine acts as a mobile generator, charging the battery that supplies electricity to the electric axles. This series-hybrid approach, historically used in locomotives, allows the truck to tow heavy loads efficiently.
In testing, the vehicle demonstrated smooth acceleration and precise control when pulling the Airstream, with regenerative braking minimizing reliance on traditional friction brakes. The system captures energy during deceleration, feeding it back into the battery for reuse. According to Edison’s Vice President of Pickups, Rich DeBoss, the truck achieved 75 miles of towing range on a single battery charge.
However, the current R2.8 Cummins engine produces below 300 lb-ft of torque, prompting plans to upgrade to a larger 3.0- to 4.0-liter diesel unit. The smaller engine operates at around 2,600 rpm, with future iterations aiming for quieter 1,800 rpm operation. DeBoss noted that the generator is currently engaged manually, though future models will automate this process.
The regenerative braking system contrasts with conventional diesel towing setups, which often rely on engine braking techniques like Jake brakes. By channeling kinetic energy back into the battery, the ReCharger reduces wear on its braking components and extends overall efficiency.
Despite its progress, the project faces challenges. Edison initially planned to sell the powertrain as a kit but encountered regulatory hurdles in Canada. The company now intends to pursue original equipment manufacturer partnerships, potentially offering fully integrated Edison-branded pickups. Individual components may also become available for enthusiasts or custom builders.
For now, the ReCharger serves as a functional prototype, validating the concept of diesel-electric drivetrains in consumer vehicles.
