Diesel costs are hammering AISC across the mining sector, and the math isn’t getting better. With fuel prices volatile and emissions pressure mounting, operators are hunting for operational leverage that doesn’t require ripping out entire fleets or waiting for technology that won’t arrive until 2028.
The electrification conversation has shifted. It’s no longer about whether to electrify: it’s about which moves deliver immediate diesel displacement without crippling capital budgets. The mines getting this right aren’t waiting for perfect solutions. They’re deploying proven hacks that cut costs now while building infrastructure for what comes next.
Here are five operational strategies actually moving the needle on diesel consumption in 2026.
Hack 1: Deploy Trolley-Assist on Your Existing Haul Fleet
Trolley-assist systems eliminate 90% of diesel consumption while connected to overhead power lines. That’s not a future-state projection. That’s operational data from Boliden’s Aitik copper mine in Sweden and Copper Mountain in British Columbia.
The strategic calculus here isn’t subtle. You’re not replacing trucks. You’re retrofitting them with pantographs that draw power from overhead trolley networks on fixed routes: typically the loaded haul from pit bottom to surface. Diesel engines handle the flexibility. Electric power handles the heavy lifting.
The fuel savings are immediate. A 220-tonne haul truck burning diesel uses approximately 134 litres per hour under load. Connect that same truck to trolley power for 60% of its cycle time, and you’ve just dropped fuel consumption by more than half. At current diesel prices, that’s $200,000+ per truck annually.
ABB’s trolley-assist implementations have demonstrated 30-70% reductions in total fuel costs depending on haul profile and trolley coverage. The infrastructure investment: overhead lines, substations, pantograph retrofits: pays back in 3-5 years at scale.
And you’re not betting on unproven technology. Trolley-assist has been running in Chilean copper mines since the 1980s. What’s changed is the sophistication of power management systems and the financial pressure to adopt them elsewhere.
Hack 2: Automate Ventilation Management Underground
Underground ventilation accounts for 30-50% of total mine energy costs. Most operations are still running ventilation systems at constant speed regardless of actual demand. That’s burning money.
Real-time ventilation optimization systems adjust airflow based on equipment location, personnel tracking, and air quality sensors. Boliden’s Kankberg gold mine delivered over 50% energy savings with automated ventilation: not through equipment replacement, but through intelligent control.
The operational logic is straightforward. If there’s no equipment or personnel in a particular zone, why are you moving air through it at full capacity? Variable frequency drives (VFDs) on ventilation fans combined with zone-based control let you match airflow to actual requirements in real time.
Here’s where this gets interesting for AISC. Ventilation energy costs typically run $3-8 million annually for mid-sized underground operations. Cut that by 40% through automation and you’ve just improved your cost structure by $1.20-3.20 per tonne. That drops straight to the bottom line.
The capital requirement is modest compared to fleet electrification: $2-5 million for sensors, controls, and VFD retrofits at most operations. Payback runs 18-30 months. Meanwhile, you’re also extending equipment life and improving underground air quality, which has downstream productivity benefits that don’t show up immediately in the energy savings calculation.
Hack 3: Electrify Drilling and Ground Support First
Mobile fleet electrification gets all the attention. But the fastest diesel displacement often comes from stationary and semi-stationary equipment: particularly drilling rigs and ground support units.
Epiroc’s battery-electric drill rigs and bolters are already operating in mines globally. These units eliminate diesel particulates in underground development headings, where ventilation costs are highest and air quality impacts productivity most directly.
The operational advantage compounds. Battery-electric drills like Epiroc’s Simba models deliver equivalent performance to diesel units while eliminating approximately 300-400 tonnes of CO₂ annually per rig. More importantly, they eliminate the need to ventilate diesel exhaust in confined spaces during development.
Technologies like automated rod magazines (ARM) and uphole brakes further optimize the drilling cycle. ARM systems reduce rod handling time by 20-30%, which means each rig completes more metres per shift. Uphole brakes eliminate rod drop damage and safety incidents, cutting consumables costs and downtime.
The AISC impact cascades. You’re not just displacing diesel: you’re reducing ventilation requirements in development headings, improving advance rates through faster cycles, and cutting drilling consumables through better equipment control. When Newmont deployed battery-electric drilling at Borden, advance rates improved 10-15% while eliminating diesel in development.
Start with 2-3 battery-electric drills and bolters in your highest-development zones. The infrastructure requirements are manageable: charging stations and electrical distribution upgrades: and the learning curve is shorter than haul truck electrification.
Hack 4: Phase Your Battery-Electric Truck Deployment
Full fleet electrification is a decade-long program requiring hundreds of millions in infrastructure investment. Most operations can’t absorb that capital hit while maintaining production growth and shareholder returns.
The alternative: start with 3-5 battery-electric haul trucks as a pilot fleet. This lets you validate cycle times, charging logistics, and maintenance requirements without betting the farm on unproven operational models at your specific site.
The operational learning is what matters. Battery-electric trucks typically deliver 10-15% productivity improvements through higher torque and regenerative braking. But they also require different dispatch logic, charging coordination, and maintenance protocols than diesel fleets.
Anglo American’s battery-electric truck trials at Mogalakwena demonstrated the importance of this phased approach. Initial deployments revealed charging infrastructure bottlenecks and dispatch optimization challenges that would have crippled operations at full-fleet scale. By starting small, they solved those problems before committing to broader rollout.
The diesel displacement math on a pilot fleet is modest: 5 trucks eliminate approximately $1-1.5 million in annual fuel costs. But the strategic value is in de-risking your eventual fleet transition while building operator experience and infrastructure incrementally.
Pair this with portable fast-charging and battery-swap solutions to eliminate range anxiety and charging downtime. Mobile Megawatt Charging Systems are already deployed at mining operations, allowing battery-electric equipment to operate continuously across multiple zones without fixed charging delays.
Hack 5: Optimize Equipment Selection for Total Cost of Ownership
Electric equipment delivers 73-83% energy cost savings compared to diesel equivalents. But the real AISC advantage comes from maintenance cost reduction and productivity gains that aren’t immediately obvious.
A 20-tonne battery-electric excavator saves $12,620 annually in fuel costs versus diesel. More importantly, it cuts preventative maintenance costs by 25-30%: approximately $15,000 over equipment lifetime: through elimination of oil changes, fuel system maintenance, and exhaust system repairs.
Electric powertrains have fewer moving parts. No fuel injectors. No turbochargers. No diesel particulate filters. Maintenance intervals extend. Unscheduled downtime drops. Those operational improvements compound into AISC reductions that exceed the direct fuel savings.
The productivity side matters too. Battery-electric loaders and trucks typically deliver 10% higher productivity through instant torque delivery and regenerative braking that diesel equipment can’t match. That means moving more tonnes per shift with the same number of units: or achieving the same production with fewer units and lower capital deployment.
The equipment premium for battery-electric units runs 20-35% over diesel equivalents. But total cost of ownership analysis consistently shows payback periods of 6-8 years when you account for fuel savings, maintenance reduction, and productivity improvements together.
Critically, you’re not locked into a single OEM’s ecosystem. Epiroc, Sandvik, Caterpillar, and Komatsu all offer battery-electric options now. Competition is driving prices down and capabilities up.
The Path Forward
These five hacks share a common thread: they’re deployable now with proven technology and measurable ROI. You’re not waiting for hydrogen fuel cells or wondering if solid-state batteries will arrive on schedule.
The mining operations cutting diesel costs in 2026 aren’t betting everything on revolutionary technology. They’re stacking incremental improvements: trolley-assist here, automated ventilation there, battery-electric drilling in development headings: that collectively reshape their cost structure.
Diesel displacement of 30-40% is achievable at most operations within 24-36 months using combinations of these strategies. That translates to AISC reductions of $2-5 per tonne depending on your current fuel intensity and energy costs.
The infrastructure investments required are substantial but manageable when phased appropriately. And unlike exploration spending or expansion capital, these investments deliver immediate cash flow improvements that self-fund the next phase of electrification.
The window for operational advantage is narrowing. Early movers are establishing cost structures their competitors will struggle to match without equivalent electrification commitments. And those commitments take years to deploy at scale.
The question isn’t whether to electrify. It’s whether you’re moving fast enough to maintain competitive positioning as diesel displacement becomes table stakes across the sector.
