On November 3, 2026, Mercedes-Benz presented its research on the "Power Converter," a technology that controls the flow of power from individual battery cells to deliver a stable high voltage of up to 800V. The current generation delivers up to 3kW and supports both alternating current (AC) and direct current (DC) uses, according to the company. The constant 800V output was already described in official material updated in December 2025, and the latest announcement adds more specifics on output and supported uses. However, it has not been decided to adopt the technology in production vehicles. A system that decouples the battery cell configuration from the voltage supplied to the vehicle could also lead to integrated charging functions, but judging its real value will require examining power losses across the entire vehicle as well as serviceability.
Separating the Number of Cells From Output Voltage
When battery cells are connected in series, the voltage of each cell adds up to form the voltage of the whole battery. In other words, in a conventional basic configuration, the number of cells connected in series is closely tied to the voltage that can be drawn from the battery. The Power Converter combines power converters with software control in an attempt to remove this constraint.
According to Mercedes-Benz's official announcement for the US, the technology uses small power converters called "microconverters" to regulate the flow of power from individual cells. It controls power at the level of a cell or group of cells, and the concept is to connect multiple Power Converters in parallel to supply a stable DC high voltage. The company says total output can also be adjusted depending on the configuration. This allows output voltage to be controlled by distributed converters rather than depending directly on the number of cells in series. However, it is neither a scheme that simply connects all cells in parallel nor an announcement that series connections will be abolished entirely.
Mercedes-Benz explains that it can hold the voltage constant at up to 800V regardless of the cells' state of charge or degradation. One point to note is that 800V and 3kW are different measures. 800V is voltage and 3kW is power, so the figure of up to 3kW cannot be used to judge the vehicle's overall drive output or fast-charging power. Nor is it a figure indicating how much energy the battery can store. In addition, the official announcement does not make clear whether the 3kW maximum is the output of a single Power Converter or of a configuration combining several.
Keeping voltage constant is also a different matter from restoring battery energy. Controlling output voltage does not restore the remaining energy depleted by discharge, nor the capacity lost to degradation. Constant voltage alone is therefore not grounds for concluding that driving range will increase.
From an 800V Concept to Concrete Specs of Up to 3kW
The official material updated in December 2025 published by Mercedes-Benz described cell pairs and the communication between them. Comparing the Power Converter explanations in that material and in the official announcement of November 3, 2026 gives the following:
| Item | Official material updated December 2025 | Official announcement of November 3, 2026 |
|---|---|---|
| Voltage | Constant high-voltage output of 800V | Constant high-voltage output of up to 800V |
| Control unit | Cell pairs and communication between them | Controls the power flow of individual cells; used at the level of cells or cell groups |
| Output | No mention of up to 3kW found in the sections compared | Current generation delivers up to 3kW |
| Conversion support | Concept of integrated functions such as bidirectional charging | Explicitly states support for AC and DC uses |
The comparison shows that the constant 800V output was already described in the material updated in December 2025, and that the latest announcement newly states the output of up to 3kW and support for AC and DC uses. However, this is not a performance comparison of commercial products; it organizes the information Mercedes-Benz had made public at each point in time. December 2025 is the date the material was updated and does not mean it was when the technology was first announced. Nor can this comparison alone tell us whether this was the first time the 3kW figure was disclosed. It would also be inappropriate to interpret the absence of a figure in earlier material as meaning the technology did not support it at that time.
The earlier explanations also included the aim of reducing the number of component types and the concept of changing functions through reprogramming. The latest announcement can be seen as adding concrete information for assessing the feasibility of those concepts.
Integrating Charging Functions Will Require Vehicle Implementation and Validation
Support for AC and DC uses also relates to the question of how many functions can be consolidated in the Power Converter. As a future possibility, Mercedes-Benz has presented a concept of integrating AC/DC conversion and bidirectional charging functions. Examples include V2H (Vehicle to Home), which supplies power from an electric vehicle to a home, and V2G (Vehicle to Grid), which returns power to the grid. If these functions could be integrated into the battery-side power conversion system, it could potentially simplify the vehicle's electrical system.
However, the explanation that the current-generation Power Converter supports AC and DC uses must be distinguished from an announcement that bidirectional charging is available in an actual vehicle. The end of the US official announcement states clearly that the technologies introduced are at the research and development stage and do not constitute an announcement of customer features or production adoption. Neither the vehicle models that will use it nor the production timing has been given, and the conditions under which power supply to homes or the grid might become available are also undecided.
Mercedes-Benz says the technology could lead to improved efficiency, longer driving range and smaller systems. However, the relevant parts of the official announcement we reviewed do not provide measured conversion efficiency or performance data across the full output range. There is also no specific explanation of cooling conditions, so it is not yet possible to judge how much benefit cell-level power conversion would bring once built into an entire vehicle.
Serviceability will also be an important item to examine. Because the work needed for repairs depends on where the converters are placed and how they can be accessed, it should be noted that this remains unclear at present. This does not mean distributed placement will necessarily make repairs harder; it means the answer cannot be judged without seeing the actual design.
What needs to be evaluated, therefore, is not only how many components can be integrated. Other important points include how the heat generated by the converters is handled, how far protection extends in the event of a fault, and whether a failed section can be isolated and replaced. These are not functions confirmed as implemented at this point; they are items to verify when judging the advantages and challenges of adopting the technology in a vehicle.
Window Display Technology Also at Research Stage; Next Focus Is Whole-Vehicle Validation
In the same announcement, Mercedes-Benz also presented a display technology that builds LEDs into a vehicle's window glass to convey warnings to following vehicles and others. Mini LEDs are envisioned for large display surfaces, and micro LEDs for high-resolution displays in small areas. A concept was also shown that uses holographic optical elements (HOE) to reflect specific wavelengths of projected light, displaying different information to the driver and front passenger depending on viewing angle. For these display technologies as well, regulatory compliance and adoption in production vehicles have not been decided.
The challenge shared by the Power Converter and the display technology is verifying how effective functions that work as individual technologies are once built into an entire vehicle. For the Power Converter, this means measuring the efficiency of the whole electrical system, including converter losses and heat dissipation, and clarifying the work and costs required for maintenance. As that validation progresses, it will become possible to judge how useful the concept of designing supply voltage and functions without being bound by the battery cell configuration will be as an option in actual vehicle development.