With the V4 Cabinet, Tesla activated its first 500 kW Supercharger in Redwood City, California, as described in this November 2025 report. It was an important milestone in the company’s development of high-power charging infrastructure.

At the time, the Cybertruck was the only vehicle described as able to make full use of that power, thanks to its 800-volt electrical architecture. However, Tesla’s pickup was not approved for sale in Europe, so the development mainly concerned the network’s technology rather than a direct benefit for European drivers.

What really changes for users?

On paper, charging at up to 500 kW suggests much shorter stops, particularly for an energy-intensive vehicle such as Cybertruck. According to chief engineer Wes Morrill, the new charger allowed Cybertruck to recover up to 44% of battery charge in 15 minutes, a 13% improvement over 250 kW V3 Superchargers as described in the report.

However, these power peaks occur only when the battery is nearly empty, below 10%. In most cases, the charging curve quickly levels off and the practical advantage over existing Superchargers is more limited.

The bigger change: the new V4 Cabinet

The most significant development was less the maximum power than the new architecture of the V4 Cabinets feeding these Superchargers. As Tesla Director of Charging Max de Zegher explained, the cabinet focused on efficiency:

  • three times the power density of the previous generation,
  • support for up to eight stalls per cabinet, compared with four for V3,
  • and the ability to deliver 1.2 MW for Tesla Semi.
tesla cabinet V4

In other words, the technology was intended not only to charge faster but also to expand the network more quickly, affecting costs, installation time and use of space in urban centres.

An investment in the future

The V4 Cabinet provides a foundation for a denser, more efficient and scalable charging network able to support the next generation of Tesla vehicles.
At the time, the charging-power benefit concerned Cybertruck, while the longer-term prospect was a more powerful and extensive network for users elsewhere, including Europe, as other vehicles became capable of accepting higher charging power.

It was therefore reasonable to expect future Teslas, including European-market cars, to benefit from faster charging as V4 technology was deployed more widely. This remained an expectation rather than a new charging capability for every existing car.

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Giorgio Rebecchi

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Giorgio Rebecchi
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