Honda has been quietly working toward a future where charging stops become optional. Today, Honda R&D, Taisei Corporation, and Taisei Rotec announced they have developed the underlaying technology for a road-embedded wireless charging system capable of transferring power to electric vehicles while they are moving, with commercial trucks weighing up to 20 tonnes squarely in scope.
The system is built on dynamic wireless power transfer (DWPT), a technology Honda has been developing since 2021. Rather than adding another plug or station to the charging equation, DWPT embeds hardware in the pavement and transfers electricity to a receiver mounted underneath a moving vehicle. The three-company partnership began joint research on this specific magnetic coupling approach in 2025, and the testing completed at Taisei’s facility in Satte has produced what they describe as foundational technology ready for public-road demonstration.
Honda has not announced what power levels passenger EVs would receive from the system. The commercial vehicle target is more specific: up to 150 kW in high-speed scenarios, enough to meaningfully extend range for a freight truck without stopping.
How It Works
The system splits into three components. Taisei supplies a DC power distribution network on the ground side. Honda R&D developed the ground assembly (GA) system, which strings together multiple transmitter units embedded in the road using a DC connection, and the vehicle assembly (VA) unit that receives the power. Taisei Rotec developed the construction methods for cutting the system into existing pavement.
The architecture is notable for one specific engineering choice: Honda integrated the inverter and coil into each GA unit as a single DWPT unit, which Honda says is a first for publicly disclosed systems. That integration moves conversion electronics into the road rather than centralizing them, which simplifies the wiring in embedded sections and reduces the component count for installation. The upside for road operators is that the GA structure accommodates standard milling and embedding methods, meaning the hardware can go into existing roads without specialty paving techniques. It is also designed for future renewal work, so units can be swapped or upgraded when the road surface is eventually repaved.
Durability was a design constraint from the start. The GA units and surrounding pavement structure are engineered to survive long-term traffic from vehicles with a gross weight around 20 tonnes, validated through testing at the Satte facility. The next phase, starting late 2026, moves to a test roadway at Taisei’s Tamura facility, where the teams will run a loading test equivalent to 1 million wheel loads at 49 kilonewtons per wheel using actual vehicles, alongside DWPT performance testing and electromagnetic field leakage evaluation.
Where It Goes Next
Public road testing is scheduled from Japan’s fiscal year 2027 onward, which begins April 1, 2027. The primary venue is the Tateyama Expressway in Chiba Prefecture, as part of East Nippon Expressway Company’s Tateyama Project for DWPT demonstration. Honda says additional partners including Denso and Ohbayashi Corporation will also participate in that demonstration.
The target market for initial deployment is logistics and transportation. Honda’s reasoning is straightforward: long-haul freight routes are predictable, the energy demand is high, and the operational benefit of reducing charge stops is directly measurable in fleet economics. Passenger EVs are part of the longer-term vision, but the commercial case is where Honda expects to prove the technology first.
The competitive landscape for dynamic wireless charging is not empty. Companies including Electreon, WiTricity, and InductEV have been developing stationary and dynamic wireless charging approaches for commercial and consumer vehicles, and several European and Israeli road trials have been running for years. Honda’s entry adds a major automaker’s engineering resources and a specific focus on high-gross-weight commercial vehicles to a field that has largely been driven by infrastructure specialists. Whether the GA unit’s integrated inverter architecture offers a meaningful installation-cost advantage over those systems is a question the Tateyama tests will begin to answer.
Honda has also been broadening its energy infrastructure footprint on parallel tracks. Its Mobile Power Pack e: swappable battery system reached U.S. B2B availability in September, targeting airport ground support equipment. DWPT is a different kind of infrastructure bet: fixed, expensive to install, and dependent on road operators adopting it at scale. The logistics sector’s appetite for that trade-off will matter more than the technology’s performance at this point.
Honda plans to show the DWPT work at the Japan Mobility Show Bizweek, October 13–16 in Chiba, and at the ITS World Congress 2026, October 19–23 in Gangneung, South Korea.
Proving it works at 150 kW under a moving 20-tonne truck is the engineering milestone. Getting road operators to embed it in expressways is the harder problem.
Source: Honda. Images courtesy of Honda.
