First Quantum patented the system it was already using to dodge diesel

The miner secured UK intellectual-property protection for its trolley-assist system in Zambia, while the world's first full-scale battery-electric mining truck completes a year of trials at the same mine.

First Quantum Minerals obtained a UK patent for the trolley-assist system operating at its Kansanshi copper and gold mine in Zambia. The mechanism uses an overhead electric line, similar to a tram's, to feed power directly to the wheels of diesel-electric trucks as they climb loaded ramps — the diesel engine shuts off on those stretches and traction comes entirely from the grid. The same mine has hosted, since April 2026, the world's first full-scale, fully electric mining truck, a Hitachi EH4000 developed in partnership between the two companies, which uses the existing trolley network to recharge its batteries along the route instead of relying solely on charging stops.

The case shows two different stages of the same electrification strategy, and the difference between them matters. Traditional trolley-assist is mature technology: miners like Boliden already report more than a 90% cut in diesel consumption and savings of up to 40 liters of fuel per kilometer of installed line, plus a speed gain on ramps — trials in Sweden showed loaded trucks running up to twice as fast uphill, reaching 28 km/h. First Quantum didn't invent this; it documented what had already been running in production for years and turned the operation into defensible intellectual property, which changes the calculus for any competitor wanting to copy the setup without negotiating a license. The fully electric truck is the next stage: eliminating the diesel engine from the equipment entirely, not just switching it off on specific stretches. The validation trial ran from June 2024 to August 2025 — more than a year of real operation, not a lab pilot — and used the existing trolley infrastructure as the backbone for recharging, which drastically cuts the investment needed to electrify an entire fleet compared with building a charging network from scratch. That combination — reusing an already-paid-for asset to enable the next step — is what separates electrification projects that scale from those stuck in pilot.

Diesel fuel typically accounts for a significant share of the operating cost and scope 1 emissions of an open-pit mine, especially large operations with long ramps. A miner that manages to cut that dependency by 90% on one stretch of the operation, and then protects the solution with a patent, creates a barrier that other copper companies — a commodity with rising demand driven by electrification and AI — will need to work around or license. For anyone working in mine planning or fleet electrification, the practical takeaway is that the fastest route to decarbonizing heavy transport isn't always the newest technology — it's the one that can inherit infrastructure that already exists.