Porsche’s Cayenne Electric Will Ditch the Charging Cable
The German automaker is set to launch the first production car with wireless charging capabilities, offering a potentially more convenient way to power up your EV.
- Porsche will offer wireless charging for its upcoming Cayenne Electric, eliminating the need for cables.
- The system delivers up to 11 kW of power, fully charging the vehicle in approximately 7.5 hours.
- The technology, demonstrated at IAA Mobility in Munich, addresses accessibility concerns for some drivers.
- While efficient, the system comes with a hefty price tag of around $8,100 in Europe.
For many electric vehicle owners, the daily ritual of plugging and unplugging can be a minor annoyance—especially when wrestling with cords in a garage or braving the elements. Wireless EV charging promises to streamline this process, and Porsche is poised to be the first to bring it to a production vehicle with the forthcoming Cayenne Electric.
A Century-Old Concept, Modernized
The idea of inductive charging isn’t new; the basic principles have been understood for over a century. It relies on two coils of copper wire, where an electrical current in one coil creates a magnetic field that induces voltage in the other. Porsche’s system takes this concept and scales it up for a large EV battery.
The floor-mounted charging pad, weighing 50 kilograms and measuring 78 centimeters wide, plugs directly into a home’s electrical panel. It converts grid electricity to high-frequency AC at 2,000 V, creating an 85-kilohertz magnetic field. This field then transfers power to the Cayenne Electric, where it’s converted back to DC voltage to charge the 108-kilowatt-hour battery pack.
Practical Considerations and Safety Features
Porsche faced several hurdles in developing this system, including ensuring safety and practicality. The waterproof pad can be placed outdoors and is designed to withstand the elements, even melting snow with temperatures reaching 50 °C. Induction loops detect metal objects between the pad and the vehicle to prevent overheating, while radar sensors halt charging if living beings are nearby.
Christian Holler, Porsche’s head of charging systems, emphasized the system’s adherence to International Commission on Non-Ionizing Radiation Protection standards. The electromagnetic field remains below 15 microteslas, deemed safe even for individuals with pacemakers. According to Simon Schulze, Porsche’s product manager for charging hardware, even a pet cat with a metal collar wouldn’t be harmed, though the collar might get warm.
Efficiency and Charging Times
The Cayenne Electric, with its 800-volt architecture, can rapidly charge at public DC stations, reaching 80 percent capacity in about 16 minutes. The wireless system offers Level 2 charging at approximately 11 kW, replenishing the battery from 10 to 80 percent in around 7.5 hours. Porsche notes that three out of four of its customers primarily charge their vehicles at home.
Porsche claims a 90 percent efficiency rate for its wireless system, despite the 12 to 18 cm air gap between the pad and the vehicle. This is comparable to the 95 percent efficiency of traditional plug-in AC charging. Last year, Oak Ridge National Laboratory (ORNL) achieved a world-record wireless rate of 270 kW with 95 percent efficiency using a Porsche Taycan, but that project prioritized maximum power transfer over cost and practicality.
Parking Made Easy
When the Cayenne Electric is within 7.5 meters of the charging pad, a parking-assist system activates on the vehicle’s screen. Drivers align green circles representing the car and the pad, with a tolerance of 20 cm laterally and 15 cm longitudinally. “You can’t miss it,” Schulze stated.
Cost and Future Adoption
The optional wireless charger will cost around €7,000 (roughly US $8,100) in Europe. Pricing for the United States has not yet been announced. Loren McDonald, chief executive of Chargeonomics, an EV-charging analysis firm, believes wireless charging “is clearly the future,” particularly for applications like robotaxis and curbside charging. However, he cautioned that the current cost will limit adoption to early adopters and niche models.
Porsche is actively working to standardize wireless charging technology with the Society of Automotive Engineers, hoping to encourage wider adoption across the industry. “We didn’t want this to be proprietary, a Porsche-only solution,” Schulze said. “We only benefit if other brands use it.”
