Tesla Supercharger slips to 4th in JD Power rankings after opening network to other EVs

JD Power has published the results of its 2026 US customer satisfaction study covering fast-charging networks. The top spot went to Ionna, a charging venture co-founded by several automakers, which scored 807 points out of a possible 1,000. Mercedes-Benz's own charging network took second place with 797 points, while Rivian Adventurer rounded out the top three with 755 points.

Tesla Supercharger dropped to fourth place with a score of 701 points, trailing the leading networks and landing ahead of Red E, Electrify America, EVgo, and ChargePoint. According to the research firm, the main factor behind Tesla's decline is the company's decision to open its Supercharger network to electric vehicles from other manufacturers. The influx of third-party vehicles has put extra strain on charging stations, leading to longer queues during peak demand periods.

Survey respondents also reported issues with Magic Dock adapter compatibility, a less convenient mobile app experience, and higher charging prices for non-Tesla owners compared with what Tesla drivers pay at the same stations. The findings highlight how the expansion of access, while beneficial for the broader EV ecosystem, has come at a cost to the user experience that Supercharger was once known for.