Mercedes Tests 800-Volt Converter and Holo Windshield

Mercedes-Benz has disclosed three research projects that could change how future vehicles move electricity and communicate information—but none of them is ready for a production-car options list. The November 3, 2026 technical update covers a modular power converter capable of producing an 800-volt output, a holographic windshield display and light-emitting elements laminated into vehicle glass.

The distinction matters. Mercedes describes all three as technologies under development, not as confirmed features for a named model, market or model year. The company has not announced a production date, price or customer availability.

The 3-kW figure is not a charging-speed claim

The most consequential project for electric vehicles may be the Mercedes-Benz Power Converter. Its current development generation can deliver up to 3 kW and support both AC and DC applications while producing a high-voltage output of up to 800 volts.

That 3-kW rating should not be confused with an EV’s traction-motor output or DC fast-charging rate. Mercedes is describing the present output of its experimental converter hardware, not promising a 3-kW charging limit for a future vehicle.

The concept uses programmable micro-converters to manage energy at the level of individual battery cells or small cell groups. Multiple units could operate in parallel and jointly supply a stable high-voltage direct-current output. In Mercedes’ description, that output could remain consistent even as cell state of charge and aging differ across the pack.

Conventional high-voltage battery packs generally reach their target voltage through the number and arrangement of cells connected in series. Mercedes’ approach aims to loosen that relationship: software-controlled power electronics would generate the required high voltage, giving engineers more freedom to arrange cells and scale the system.

The company also says the hardware could eventually combine functions now handled by separate components, including AC-to-DC and DC-to-DC conversion, while supporting bidirectional charging. If the concept proves practical at vehicle scale, it could make battery and powertrain architectures more modular for battery-electric vehicles and plug-in hybrids.

Important questions remain unanswered. Mercedes has not published vehicle-level efficiency, thermal-management data, cost, mass, packaging requirements or a production-scale power target. It also has not identified a vehicle test program. For comparison, our report on the Audi A2 e-tron’s APP350 motor and silicon-carbide inverter covers hardware tied to a specific production vehicle, while this Mercedes system remains a research platform.

A holographic film turns sections of the windshield into displays

The Holo Display project moves information away from a conventional dashboard screen. A projector inside the instrument panel sends light toward a transparent film laminated into the windshield. Holographic optical elements in that film reflect selected wavelengths toward a specific viewing position.

Mercedes says the optical design can keep an image visible in sunlight while limiting it to a chosen viewing angle. In the demonstrated concept, the driver would not see content intended for the front passenger, and the passenger would not see the driver’s information.

Potential uses include navigation guidance, information about nearby points of interest, driving data, video calls and passenger entertainment. The display is meant to appear only when needed, leaving the glass visually conventional the rest of the time.

Those examples are possibilities, not a feature list. Mercedes has not provided display resolution, field of view, power consumption, regulatory approval or safeguards against distraction. The company also has not said whether the technology would supplement or replace a head-up display. It is one more example of automakers moving vehicle interfaces beyond the center screen, following production-focused systems such as the new Porsche Communication Management generation.

LEDs in glass could warn nearby road users

The third project embeds LED elements directly into laminated vehicle glass. Mercedes is studying mini LEDs for larger surfaces such as a rear window, where they could show brake indications, warning symbols or traffic information to people behind the vehicle.

Micro LEDs would serve smaller, higher-resolution areas where animations or more detailed graphics are useful. Mercedes says both types can remain nearly invisible when inactive, allowing the window to retain a normal appearance until the vehicle needs to communicate.

This is best understood as an exploration of external vehicle communication. No production application has been announced, and the release does not establish whether regulators would permit the proposed graphics on public roads. Any use as a brake or warning signal would need to satisfy lighting, visibility and driver-distraction rules in each market.

What Mercedes has—and has not—announced

The three projects address different layers of a future vehicle: energy conversion inside the high-voltage system, information for people inside the cabin and communication with people outside it. The power converter has the clearest numerical specifications—up to 800 volts and 3 kW in its current form—but Mercedes presents even those figures as development-stage capabilities.

The official Mercedes-Benz announcement contains no confirmed series-production program, launch window, pricing, market availability or named vehicle. Its claims have not been independently tested by Chiefs Review. The practical value will depend on whether the company can scale the converter, validate the optical systems in real traffic and clear the relevant safety regulations.

For now, the update is a useful look at Mercedes’ engineering priorities rather than a preview of equipment buyers can order. The company is trying to make the high-voltage system more flexible while reducing the number of visible screens and giving the vehicle new ways to communicate. Turning those ideas into durable, affordable and legal production hardware is the next—and much harder—step.

Featured image: Official Mercedes-Benz research composite showing the Holo Display, intelligent LED glass and modular power-converter concept. © Mercedes-Benz USA. Editorial use only; see the official media asset and usage terms.