EnerVenue has opened its first high-volume battery manufacturing facility in Changzhou, China, moving its fourth-generation aqueous metal cell technology into commercial-scale production after several months of equipment installation and commissioning.
The new line is approximately 95% automated and is intended to reach 250MWh of annual manufacturing capacity during 2026, equivalent to roughly 300 cells per day. EnerVenue plans to increase annual capacity to 1GWh by the third quarter of 2027 and has outlined further expansion beyond that point.
The company expects the Changzhou operation to employ around 400 people by the end of this year. Chief executive Henning Rath has put the cost of the manufacturing facility between $20 million and $50 million, materially below the capital value previously attached to an abandoned US factory proposal.
EnerVenue announced plans in 2023 for an initial manufacturing phase in Kentucky costing $264 million and expected to create 450 jobs. That project was subsequently dropped as the company redesigned both its battery and its proposed production system before shifting the first high-volume line to China.
The change illustrates how manufacturing location depends on more than labour cost or incentives. EnerVenue has pointed to the concentration of automation engineering, pneumatics, hydraulics, equipment suppliers, and manufacturing expertise around Changzhou as a major factor in choosing the site.
That supplier density is particularly important when industrialising a new battery design. Production equipment is rarely available as a complete standard line for a technology that has not previously been made at commercial scale.
Fixtures, handling systems, process tooling, inspection equipment, controls, and automated material movement may require repeated changes while engineers establish how the product behaves at manufacturing speed.
EnerVenue has spent recent months installing machinery, powering up systems, carrying out acceptance testing, and adjusting processes before the formal opening. The objective is not merely to demonstrate that individual machines operate, but to show that the complete line can produce cells consistently at the required throughput.
The fourth-generation product is described by EnerVenue as an aqueous metal cell derived from nickel-hydrogen battery principles. The technology differs materially from conventional lithium-ion chemistries and is being positioned primarily for stationary infrastructure rather than passenger vehicles.
EnerVenue is targeting applications where long operating life and frequent cycling matter more than minimum weight. The company specifies a design life of up to 30,000 cycles and has promoted the chemistry for grid storage, renewable-energy integration, data-centre power, and other stationary uses.
Those claims still have to be proven through long-term field operation at commercial scale, but they explain the production strategy. A stationary cell can accept different compromises around mass and packaging from an automotive battery if its lifetime, thermal behaviour, maintenance requirements, and cycling performance support the economics of the installation.
Manufacturing repeatability remains critical. A long claimed service life is commercially useful only if cell-to-cell variability is sufficiently narrow for complete racks and systems to behave predictably.
Automated assembly, controlled material handling, inspection, traceability, and end-of-line testing therefore become increasingly important once production moves beyond pilot quantities.
EnerVenue already has fourth-generation cells operating in a pilot project with Towngas in Changzhou. Fifty cells are being used in an Energy Rack configuration alongside renewable generation and electric-bus charging, giving the company field data while the manufacturing operation moves into higher volumes.
The pilot and factory address different risks. A field installation can demonstrate how the battery behaves during repeated operation, while the production line has to show that hundreds of cells can be manufactured consistently each day.
Scaling one without the other leaves either a technology that cannot be supplied economically or a factory producing a product without enough operating evidence.
The Changzhou line uses automated handling between production stations, including mobile and robotic systems intended to reduce manual movement as throughput increases.
A high level of automation can improve consistency, but it also shifts more responsibility into equipment reliability, controls, maintenance, and fault recovery. A manual station can sometimes continue operating around a minor problem; a tightly linked automated line may stop several processes if one transfer system fails.
Overall equipment effectiveness therefore becomes important as the factory approaches its 250MWh target. Nominal machine speed says little about annual output if faults, changeovers, quality holds, or maintenance reduce available production hours.
EnerVenue will need stable uptime and acceptable first-pass yield before theoretical production capacity becomes dependable saleable output.
The company raised more than $300 million earlier this year to support manufacturing scale-up and wider commercial deployment. It has said Changzhou is intended as the first stage of a broader manufacturing strategy, with possible production in North America, Europe, and the Middle East from 2028.
Future localisation will depend partly on how well the Chinese line proves the manufacturing process. Once tooling, automation logic, inspection methods, and process settings are stable, reproducing the factory elsewhere becomes less risky than trying to establish several first-of-kind lines simultaneously.
Changzhou is therefore both a commercial factory and a manufacturing-development platform. The opening marks the move into high-volume production, but the evidence will come from output: whether a roughly 95% automated line can reach 250MWh, maintain product consistency, and provide a credible template for the 1GWh expansion planned during 2027.
