The transition to zero-emission haulage has reached a new industrial scale in Western China. At the Xinjiang Zijin Zinc mine, a subsidiary of Zijin Mining Group, the deployment of 290 battery-electric haul trucks has officially established the world’s largest pure-electric mining fleet at a single site. This operation serves as a massive-scale pilot for the mining industry’s move away from diesel-dependent logistics, utilizing a 4-minute robotic battery-swap system powered by a dedicated wind and solar microgrid.
As mining operators globally grapple with Scope 1 emission mandates and rising fuel volatility, the Xinjiang project provides a concrete dataset on the feasibility of ultra-large electric fleets in harsh, remote environments. The shift from 13 electric vehicles in 2020 to over 1,100 across the Zijin Group by late 2025 signals a pivot from experimental use cases to core operational integration.
The Scale of Xinjiang Zijin Zinc Operations
The Xinjiang Zijin Zinc mine is one of the most significant lead-zinc operations in China. Traditionally, such sites have been heavy consumers of diesel, with haulage often accounting for up to 40% of total mine-site energy consumption. The deployment of 290 electric trucks, each with a 90-tonne capacity, represents a total replacement of conventional primary haulage for the site’s open-pit extraction phases.
Unlike many earlier "green" mining initiatives that relied on a handful of prototype vehicles, the Xinjiang fleet is a high-density operational unit. The trucks are primarily sourced from Breton Technology and Fujian Longking, the latter of which Zijin controls. These 90-tonne units are engineered for high-cycle environments, where downtime is the primary enemy of profitability.
4-Minute Battery Swaps: Solving the Downtime Problem
The most significant barrier to the adoption of battery-electric vehicles (BEVs) in mining has historically been charging time. Conventional plug-in charging for a 90-tonne truck can take several hours, rendering the vehicle unproductive for large portions of a shift. To circumvent this, Zijin and Fujian Longking developed a side-loading battery-swap system tailored specifically for the Xinjiang site.
The system allows a truck to enter a specialized station where a robotic arm removes the depleted battery pack and replaces it with a fully charged unit in approximately four minutes. This turnaround time is comparable to, and in some cases faster than, traditional diesel refueling.
| Operational Metric | Value / Specification |
|---|---|
| Total Fleet Size | 290 Battery-Electric Trucks |
| Truck Payload Capacity | 90 Tonnes |
| Battery Swap Time | 4 Minutes |
| System Availability | >90% |
| Energy Consumption Reduction | ~17% vs. Comparable Diesel Fleet |
| Primary Power Source | Wind, Solar, and Hydropower |
This rapid exchange capability ensures that the fleet maintains a system availability of over 90%, matching the operational cadence of diesel fleets. The "battery-as-a-service" model also allows the mine to manage battery health and charging cycles independently of truck operations, extending the lifespan of the expensive lithium-ion components.
Integrated Renewable Power and Microgrids
A large-scale electric fleet is only as "green" as the grid that powers it. In Xinjiang, the mine leverages the region's vast solar and wind resources to create an integrated energy loop. Zijin has installed over 1,000 MW of clean-energy capacity across its global operations, but the Xinjiang site is a flagship for the "mine-energy system" concept.
By pairing the truck fleet with on-site renewable generation and stationary energy storage, the mine reduces its reliance on the national grid and insulates itself from energy price spikes. When wind or solar generation is at its peak, the excess energy is used to charge the pool of spare batteries in the swapping stations. This turns the haulage fleet into a giant, mobile energy storage system that helps balance the mine’s overall load.
Economic and Operational Impact
While the environmental benefits are a primary driver for the Skillings Mining Intelligence community, the economic data from the Xinjiang site is what will ultimately drive wider adoption. Initial field reports from the LK220E and related electric models indicate that energy consumption is approximately 17% lower than comparable diesel trucks when factoring in regenerative braking on downhill hauls.
Electric motors offer high torque at low speeds, which is ideal for the steep ramps of open-pit mines. Furthermore, BEVs have significantly fewer moving parts than internal combustion engines: no transmissions, cooling systems for engines, or complex exhaust treatments: which translates to lower maintenance costs over the vehicle's lifecycle.
In the 2026 outlook, the success of the 290-truck fleet is expected to catalyze similar deployments at Zijin’s other global assets, including the Bor copper mine in Serbia and the Kamoa-Kakula complex in the DRC.
Monitoring and Autonomous Integration
Managing a fleet of nearly 300 electric vehicles requires a level of digital oversight far beyond traditional fleet management. The Xinjiang site utilizes a centralized control room where every truck’s state of charge, battery health, and location are monitored in real-time.
This digital infrastructure is the precursor to full autonomy. Zijin is already testing the LK110EI, an autonomous version of its electric haulage units. The predictability of electric drivetrains: which respond more precisely to software commands than diesel engines: makes them the preferred platform for the next generation of driverless mines. By removing the operator and the diesel engine simultaneously, mining companies can optimize "pit-to-port" logistics to a degree previously impossible.
Challenges and 2026 Outlook
Despite the success in Xinjiang, the path to global zero-carbon haulage is not without risks. The primary challenge remains the capital expenditure (CapEx) associated with battery infrastructure. While operational expenses (OpEx) are lower, the upfront cost of 290 trucks plus several hundred spare battery packs and automated swap stations is significant.
Furthermore, the performance of lithium-ion batteries in extreme temperatures: such as the frigid winters of Xinjiang or the intense heat of the Australian outback: remains a critical area of study. Zijin’s data suggests that specialized thermal management systems are keeping the Xinjiang fleet operational, but these systems add another layer of complexity to the hardware.
As we move toward the end of 2026, the industry will be watching the Xinjiang Zijin Zinc mine for long-term reliability data. If the 290-truck fleet continues to match or exceed diesel productivity, it will likely mark the end of the "trial phase" for electric haulage. For investors and operators following the latest mining trends, the Xinjiang milestone is the clearest evidence yet that the energy transition in mining has moved from the boardroom to the pit floor.
Conclusion
Zijin Mining’s deployment in Xinjiang is more than just a record-breaking fleet; it is a proof-of-concept for the future of industrial-scale mineral extraction. By integrating 90-tonne electric trucks with 4-minute battery swapping and renewable microgrids, the company has addressed the three biggest hurdles to decarbonization: downtime, energy cost, and grid reliability.
As the global mining sector faces increasing pressure to reach net-zero targets by 2030 and 2050, the "Xinjiang Model" provides a scalable blueprint that replaces the uncertainty of the diesel market with the stability of on-site renewable power.
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Zijin Mining has deployed the world’s largest fleet of 290 battery-electric trucks at its Xinjiang zinc mine. With 4-minute robotic battery swaps and a dedicated wind/solar microgrid, this project provides the industry's first large-scale dataset for zero-carbon haulage. Read our deep dive into the technology and 2026 outlook. #MiningTech #EnergyTransition #ZijinMining #ESG #ElectricVehicles
