ProLogium’s Solid‑State Battery Powers a Real Construction Machine for the First Time

The Machine: A Solid‑State Battery in Real Construction Equipment

The NE100MG is an electric soil‑improvement machine designed for construction and environmental engineering work. At N‑EXPO in Japan, Nakayama Iron Works exhibited the machine powered by ProLogium’s next‑generation lithium‑ceramic battery system.

For heavy equipment, the battery is not just a power source—it directly affects uptime, safety, and operating costs. Nakayama emphasized safety and reliability when selecting the battery technology, since such machines often operate in demanding industrial environments.

Key Performance Claims of the Fourth‑Generation Battery

ProLogium’s solid‑state lithium ceramic design is intended to address several long‑standing limitations of conventional lithium‑ion batteries.

Energy density
The company reports roughly 359–380 Wh/kg specific energy and about 810–860 Wh/L volumetric energy density, allowing more energy to be packed into smaller, lighter battery systems.

Higher energy density is especially valuable in construction equipment where pack size and weight affect machine design and runtime.

Ultra‑fast charging
ProLogium states the battery can charge from about 5% to 60% in roughly 4 minutes and to about 80% in around 6 minutes under its specified charging conditions.

For industrial machines that must minimize downtime between work cycles, rapid charging could significantly improve productivity.

Cold‑temperature operation
The battery is designed to operate stably at −20 °C, addressing a common weakness of many battery systems in cold climates.

Reliable low‑temperature performance is particularly important for construction and environmental equipment used outdoors year‑round.

The Companies Behind the Project

The demonstration reflects a collaboration between three organizations:

• ProLogium Technology – developer of the solid‑state lithium ceramic battery technology.
• Nakayama Iron Works – the Japanese manufacturer of the NE100MG construction machine.
• Kyushu Electric Power – supporting the project and broader electrification initiatives around next‑generation machinery.

The partnership aims to explore how solid‑state batteries can power future construction equipment and robotics platforms.

Scaling Up Production: Taiwan and France

For solid‑state batteries to move beyond demonstrations, manufacturing scale is crucial. ProLogium has begun expanding production capacity on two continents.

Taiwan manufacturing
The company reports giga‑scale automated production in Taiwan and says cumulative shipments of its battery products have exceeded 2.4 million units, indicating increasing manufacturing maturity.

European gigafactory
In February 2026, ProLogium broke ground on a gigafactory in Dunkirk, France, intended to produce its fourth‑generation all‑inorganic solid‑state lithium ceramic batteries.

According to project plans, the facility will begin with a smaller initial phase and gradually expand capacity, with long‑term targets reaching around 12 GWh annually by the early 2030s.

This facility represents the company’s first production site outside Taiwan and is part of Europe’s push to build a domestic battery supply chain.

Why This Demo Matters for Solid‑State Batteries

For years, solid‑state batteries have been widely discussed but rarely seen in operational machines. The NE100MG demonstration is significant because it shows the technology integrated into working industrial equipment rather than laboratory prototypes.

If the performance claims hold under real operating conditions, several potential advantages become clear:

• Faster turnaround times thanks to extremely rapid charging.
• Higher energy density, enabling lighter or longer‑running electric machines.
• Improved safety and durability compared with liquid‑electrolyte lithium‑ion batteries.
• Better cold‑weather performance for outdoor industrial applications.

Construction equipment may actually be an ideal early market. Machines often operate in controlled fleets, return to charging stations frequently, and benefit strongly from fast charging and compact battery packs.

What It Could Mean for Electric Vehicles

The same performance characteristics—higher energy density and ultra‑fast charging—are also major goals for passenger EVs. However, the path to large‑scale automotive adoption still depends on several unresolved factors:

• manufacturing cost at scale
• long‑term durability in large battery packs
• sustained high‑volume production yields

ProLogium’s strategy pairs real‑world demonstrations with manufacturing expansion, a step that many analysts consider necessary for solid‑state batteries to move toward commercialization.

The Bottom Line

The NE100MG showcase at N‑EXPO represents an early but tangible step toward real‑world solid‑state battery deployment. By combining a live industrial application with plans for gigafactory‑scale production, the project provides one of the clearest signs yet that solid‑state technology is moving beyond prototypes.

Whether it becomes widely adopted in construction equipment—or eventually in mainstream electric vehicles—will depend on how these batteries perform outside demonstrations and how quickly manufacturers can scale production.