Eve Energy kicks off solid-state battery production

The year 2026 is fast becoming a massive turning point for the world of electric cars. We have spent years hearing about the "next big thing" in battery technology, but a major industry player has moved from talk to action. Eve Energy, a company that supplies batteries to the likes of Tesla and BMW, has officially started producing its latest solid-state batteries. These new power cells, called the Longquan No. 3 and Longquan No. 4, represent a shift away from the liquid-filled batteries we use today.

Many people wonder why solid-state batteries are such a big deal for EVs. Current electric cars use liquid electrolytes to move energy around. Solid-state technology replaces that liquid with a solid material. This change makes batteries safer, lighter, and able to hold more energy. Eve Energy is already making these at their factory in Chengdu, China, proving that this futuristic tech is finally ready for the real world.

The company is focusing on two types of batteries. They created the Longquan No. 3 specifically for consumer electronics - phones, tablets, and laptops. This battery is designed to work under low pressure - less than 2 megapascals (MPa). When it comes to batteries, keeping things pressed together is hard, so being able to work at low pressure is a technical win. It means the battery can stay small and fit easily into the gadgets we carry every day.

For those interested in electric cars, the Longquan No. 4 is the star of the show. This version is built for "traction applications" - it can power the wheels of a vehicle. This battery has a capacity of 60 Ah (around 54 kWh at 900V), but to make it work correctly, it needs a bit more pressure than the phone version - about 5 MPa or less. That might sound technical, but it is actually a breakthrough. Lowering the pressure needed makes it much easier for car companies to build these batteries into the frames of new EVs.

Eve Energy has deep roots in the automotive world. The company already has supply deals with giants like Mercedes-Benz and BMW. It even has a joint venture for commercial trucks with Cummins and Paccar. This means the technology they are developing today could very soon find its way into everything from a small sedan to a massive delivery semi-truck.

It is helpful to look at the timeline to see how fast things are moving. Only a few months ago, in September 2025, Eve Energy opened its pilot base and showed off an earlier version of the battery known as Longquan No. 2. That older model was meant for things like drones and robots. Moving from drones to full-sized electric cars in such a short time shows how much pressure these companies are under to innovate. Every car maker wants to be the first to offer a "forever battery" that charges fast and lasts a long time.

Of course, Eve Energy is not the only company in this race. Other brands are also pushing hard in 2026. Volkswagen has partnered with Gotion, which has already finished a huge production line for solid-state batteries. Mercedes-Benz is also working with Farasis Energy, which recently delivered a battery that can hold 400 Wh/kg of energy. The competition is getting fierce, and that is usually good news for EV buyers because it leads to better tech and lower costs.

There are still some secrets we don't know yet. Eve Energy has not told the public how much these batteries will cost or exactly how far they will take a car on a single charge. We also don't have the specific dimensions or weight for the final packs. For now, the company is focused on making sure the production process works perfectly before they start putting them into millions of cars. Even without a price tag, the fact that these batteries are physically rolling off a line is a huge win for the industry.

We are watching the "lab phase" of battery history end and the "factory phase" begin. Solid-state technology used to be a dream for the future of EVs, but companies like Eve Energy are making it a reality in 2026. While we wait for the first Tesla or BMW to hit the road with these specific cells, it is clear that the way we power our world is changing fast.

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