| Duty Cycle and Productivity Assumptions |
| Rated payload | 40 tonnes | 40 tonnes | Same rated payload is assumed for a fair comparison; confirm payload under the actual body and site configuration. |
| Scheduled operating time | 2,000 hours/year; 10,000 hours over 5 years | 2,000 hours/year; 10,000 hours over 5 years | Five-year ownership period, excluding financing and taxes. |
| Effective productive availability | 85% | 82% | Illustrative share of scheduled hours available for productive hauling; electric availability includes assumed charging and maintenance downtime. |
| Productive hauling hours over 5 years | 8,500 hours | 8,200 hours | Scheduled hours × effective productive availability. |
| Average haul cycles per productive hour | 3.0 | 3.0 | Site-specific assumption; actual cycles depend on route length, grade, loading, dumping, traffic, and operator practice. |
| Estimated annual moved material | 204,000 tonnes | 196,800 tonnes | Payload × cycles per hour × productive hours per year. |
| Estimated five-year moved material | 1,020,000 tonnes | 984,000 tonnes | Payload × cycles per hour × productive hauling hours over five years. |
| Purchase and Operating Cost Assumptions |
| Initial vehicle purchase price | $450,000 | $750,000 | Illustrative planning inputs; actual prices vary by specification, market, and contract. |
| Charging infrastructure allocation | $0 | $60,000 | Electric-truck site equipment and installation allocation; excludes major grid upgrades. |
| Energy use per productive hauling hour | 38 litres of diesel | 120 kWh of electricity | Planning estimate; electric energy includes charging losses as reflected in the assumed average. |
| Energy price assumption | $1.15/litre | $0.12/kWh | Illustrative delivered fuel and electricity prices; demand charges or time-of-use rates may change results. |
| Energy cost per productive hauling hour | $43.70 | $14.40 | Energy use × assumed energy price. |
| Maintenance and repair cost per productive hauling hour | $25.00 | $16.00 | Illustrative average; validate against local service, parts, labour, and duty-cycle records. |
| Tire cost per productive hauling hour | $12.00 | $12.00 | Assumed equal for comparison; tire life depends on payload, haul road, speed, and tire management. |
| Battery replacement / degradation reserve over 5 years | $0 | $50,000 | Planning reserve only; not a prediction of replacement. Check warranty terms, usable capacity, and expected duty cycle. |
| Five-Year Total Cost of Ownership Estimate |
| Energy cost over 5 years | $371,450 | $118,080 | Energy cost per productive hour × productive hauling hours over five years. |
| Maintenance and repair cost over 5 years | $212,500 | $131,200 | Maintenance cost per productive hour × productive hauling hours over five years. |
| Tire cost over 5 years | $102,000 | $98,400 | Tire cost per productive hour × productive hauling hours over five years. |
| Estimated five-year TCO | $1,135,950 | $1,207,680 | Purchase price + infrastructure + energy + maintenance + tires + battery reserve. |
| TCO per scheduled hour | $113.60 | $120.77 | Five-year TCO ÷ 10,000 scheduled hours. |
| Estimated TCO per tonne moved | $1.11/tonne | $1.23/tonne | Five-year TCO ÷ estimated five-year tonnes moved; sensitive to productivity and local energy prices. |
| Estimated five-year TCO difference | $71,730 higher for the electric scenario | Based only on the assumptions shown; the result can change materially with charging, availability, utilization, and energy costs. |