Ionna passes 180 charging sites as Toyota and Lexus Plug & Charge arrives in October

A network that doubled in nine months

Ionna is a joint venture of BMW, General Motors, Honda, Hyundai, Kia, Mercedes-Benz, Stellantis and Toyota. According to Toyota's account of the announcement, the network has passed 180 live sites, and more than 40 of its Rechargeries are at Circle K locations that came online after the two companies announced their partnership in April.

Ionna says it is now the largest 400-kW public charging network operator in the country. Wards Intelligence notes that 400 kW has become the new top tier for U.S. fast charging, up from the 350-kW hardware used by networks such as Electrify America, and that very few EVs can pull more than 350 kW even briefly. In practice, most drivers will not see 400 kW on their screens. What they gain is headroom and, in theory, steadier speeds when several cars are plugged in at once.

Discounts, apps and Plug & Charge

Starting October 1, BMW, Hyundai and Mercedes-Benz owners get 10% off Ionna charging through their automaker apps and Plug & Charge, according to Electrek, which says the remaining founding automakers are expected to follow. Wards reports that GM drivers already have a discount through their app.

Ionna has no app of its own. Instead it works through partner apps, and the count has risen to 19 with the addition of Presto, ChargeHub, EV Connect and the Toyota and Lexus apps. Toyota's release says Plug & Charge for certain Toyota and Lexus models is coming soon without giving a date, while Electrek puts it in October.

What the ranking does and does not show

Ionna ranked first among DC fast-charging networks in J.D. Power's 2026 U.S. Electric Vehicle Experience Public Charging Study, in its first year of eligibility. Wards reports that Tesla's Supercharger network finished fourth. Overall DC fast-charger satisfaction rose to 666 on a 1,000-point scale, and the share of charging visits that failed fell to 12% from 14% a year earlier, the lowest level in the study's history, according to the trade report on J.D. Power's results.

Two caveats apply. A satisfaction score reflects owners who used a network, and a young network with new hardware has an easier job than one maintaining older sites. And Ionna's 180 sites remain a fraction of Tesla's Supercharger footprint, so coverage depends heavily on where you live and drive. For road trips, check the site map for your route before assuming a 400-kW stop is nearby.

For a Toyota or Lexus owner, the change coming this month is mostly about convenience. If the update arrives as described, you will no longer need to open an app or tap a card at an Ionna charger.