A little while ago I mentioned Panasonic was behind Toyota’s plans for solid state battery delivery in 2027.

Honda now is saying they predict a 2030 delivery of their in-house version that has impressive advantages over current EV safety and performance. The details now are all about industrialized output being cost competitive.

Honda says its ability to prototype new materials and processes on a mock assembly line will let it iterate on all those factors as quickly as possible and, the company stressed, will help it produce solid-state cells that are cost competitive with existing alternatives. That will let it achieve economies of scale faster and deploy the cells across many more products more quickly.

To be fair, Stellantis has been boasting it will be putting solid state battery “demonstration” cars on roads already in 2026.

Stellantis is taking another step forward in the EV race, partnering with Factorial to incorporate solid-state batteries into a demonstration fleet of Dodge Charger Daytona vehicles. Based on Stellantis’ STLA Large platform, this fleet will showcase Factorial’s solid-state battery technology in action by 2026.

And the Chinese like to say their Chery will achieve the first ready big production line.

Bottom line is Toyota’s release date has slipped before while Honda’s looks reliable. Stellantis seems just to be trying to jump the PR cycles, but in any case solid state is moving into mass production. The availability no longer will be just theoretical, as we watch the brands where real EV innovation is happening.