Tesla to solely build V4 power units in the US – as V3 production phased out
Tesla established the V4 Supercharger generation as a concept in 2023. However, the first sites in the USA equipped with V4 technology – including both charging stalls and switchgear cabinets – only became operational in late summer last year. These enable the Cybertruck and 800-volt electric vehicles from other manufacturers to achieve charging speeds of up to 500 kW, while the electric truck Semi is even expected to draw up to 1.2 MW using this technology.Background: The V4 Superchargers, which Tesla began rolling out in spring 2023, were effectively a hybrid design. While the new V4 stalls were deployed – featuring a redesigned charging pillar and longer cables for non-Tesla vehicles—the maximum charging power remained unchanged at 250 kW when transitioning from V3 to V4 stalls. This was because the older V3 switchgear cabinets (referred to by Tesla as ‘Cabinets’) were still in use. Only the Cybertruck, as an 800-volt model, could achieve up to 325 kW from V4 stalls with V3 cabinets in North America, while other Tesla models were limited to 250 kW.Production of these V3 switchgear cabinets in the USA is now being phased out, as Tesla announced in a post on X, which included a team photo from the site. It remains unclear whether production in China has also fully transitioned to V4. A separate factory near Tesla’s Gigafactory 3 in Shanghai has been manufacturing charging technology since 2021. The US facility in question is the Gigafactory 2 production site in New York. Tesla subsidiary SolarCity has been a tenant there for around a decade, producing not only charging pillars and switchgear cabinets but also other components for the Tesla ecosystem.Recall that, in mid-November 2024, Tesla unveiled the V4 cabinets, which enable charging power of up to 500 kW at V4 stalls. The first publicly accessible charging site with these cabinets was installed in September 2025 at a charging park in Redwood City, California. Several such sites now exist. According to Tesla, these cabinets represent ‘the world’s most reliable power electronics’. The company also expects the V4 cabinets to reduce costs and accelerate the rollout of charging infrastructure.It’s important to note that, initially, only Tesla vehicles could use the V4 Superchargers with V4 cabinets. Tesla stated in September that it first wanted to collect data and complete further technical tests but aimed to open the chargers to third parties in the fourth quarter of 2025. By now, 800-volt vehicles from other manufacturers should also be able to achieve their maximum charging speeds at Tesla charging stations.x.com
