I'm going to take this with a grain of salt but Nissan's vice president for R&D in Europe says that they plant to start solid state battery production in 2028.

In early 2022, Nissan announced plans to start series production of solid-state batteries in 2028. Before that happens, a pilot production plant will be up and running by 2025, with the engineering work completed by 2026. In a new interview with the British magazine Autocar, the company's vice president for R&D in Europe talked about the three main advantages.

David Moss reiterated solid-state batteries will triple charging speeds, reaching up to 400 kW. In addition, Nissan is looking to double the energy density and cut production costs in half compared to current lithium-ion batteries. In this stage of development, the engineers in Japan in collaboration with scientists at the University of Oxford have created 10-centimeter square cells. The final cells will have just about the same size as a laptop.

Nissan is working on all-solid-state batteries, meaning all liquid elements will be removed. Moss told Autocar the automaker currently has the edge when it comes to deleting the liquid electrolyte. Keeping it would have a negative impact on energy transfer and power. He went on to mention using the new tech will make it more feasible to launch large electric pickup trucks and SUVs.

Featured here, the futuristic Surf-Out was unveiled at the end of 2021. However, 2028 is still a long way off, so it seems unlikely the concept was an early preview of an electric ute with solid-state batteries. It may or may not be related to a recent rumor about Nissan planning a small electric truck for the United States.

Moss declined to specify which EV will be the first to use solid-state batteries, but strongly suggested it won't be related to current models. He explained a completely new architecture is necessary, mentioning Nissan could offer two battery sizes rechargeable at constant speeds without depending on temperature variations.

Pursuing solid-state batteries doesn't mean Nissan has abandoned lithium-ion batteries as Moss believes the two will coexist for a while. A new generation of lithium-ion packs will be ready around the middle of the decade, with a cobalt-free battery slated to follow in 2028. The latter generation is estimated to slash costs by up to 65 percent compared to today's batteries.