Wireless charging technology for EVs reaches 95% efficiency and allows vehicles to power electrical grids.

Written by Fabio Lucas Carvalho

Published on 18/04/2026 at 20:05

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The high-efficiency induction system eliminates the dependency on cables, enabling dynamic supply on highways and the return of energy to the grid.

The wireless charging technology for electric vehicles has reached a historic milestone of 95% efficiency, matching traditional systems with cables.

Developed by researchers at the Oak Ridge National Laboratory (ORNL), the system uses electromagnetic induction energy transfer to power batteries quickly and safely. In addition to simplifying refueling, the innovation allows cars to function as mobile storage units to stabilize electrical grids.

Energy efficiency and charging in motion

The advancement in wireless charging efficiency for EVs allows energy to be transferred through an air gap without significant heat loss. Using advanced design electromagnetic coils, the ORNL system achieved a transfer rate of 100 kW, representing a substantial leap from previous prototypes.

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Bidirectional integration and support for electric grids

One of the differentiators of this project is the capability for bidirectional energy flow, transforming the vehicle into an asset for urban infrastructure. With wireless charging efficiency for EVs operating at high levels, cars can return excess energy to homes or to the electrical grid during peak demand.

This functionality, known as Vehicle-to-Grid (V2G), helps balance loads and integrates renewable energy sources more effectively.

The system operates through a rotating magnetic field that synchronizes the frequency between the base plate and the receiver in the vehicle. This technical precision ensures that energy flows in both directions with maximum safety, preventing overloads in the automobile storage system. The technology of wireless charging efficiency for EVs makes energy management smarter and more automated, without manual user intervention.

Future of infrastructure and urban sustainability

The commercial application of this wireless charging efficiency for EVs technology promises to revolutionize the planning of smart cities.

By integrating induction charging at bus stops and logistics areas, entire fleets can operate for 24 hours without interruptions for refueling at fixed stations. ORNL highlights that the maintenance cost of wireless systems is lower than that of wired systems, due to the absence of mechanical wear on connectors.

In the long term, high wireless charging efficiency for EVs directly contributes to the reduction of the global carbon footprint. With more frequent and efficient charging, batteries can be smaller and lighter, requiring less extraction of critical minerals such as lithium and cobalt.

The success of these large-scale tests marks the beginning of a new era where mobility and the electrical grid operate in a fully symbiotic manner.

With information from Interesting Engineering

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Wireless charging technology for EVs reaches 95% efficiency and allows vehicles to power electrical grids.

The high-efficiency induction system eliminates the dependency on cables, enabling dynamic supply on highways and the return of energy to the grid.

Energy efficiency and charging in motion

Bidirectional integration and support for electric grids

Future of infrastructure and urban sustainability

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Wireless charging technology for EVs reaches 95% efficiency and allows vehicles to power electrical grids.

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