A quarry is the most controlled heavy-vehicle environment in the world, which is exactly why it is the best place to optimise an electric dump truck. Every truck runs the same loop: load at the face, haul to the crusher, return empty, repeat. The distances, grades and load weights are known to the metre and the tonne, so productivity is a solvable engineering problem rather than a forecast. This guide shows how to match the KTA1 to the excavator, how to calculate the cycle, and how regenerative braking on the loaded downhill return turns the quarry’s own geometry into free energy.
The first lever is load time, and load time is set by the excavator-to-truck volume ratio. The rule of thumb is a loader or excavator bucket capacity that fills the truck in three to five passes, so the truck is loaded in 3-5 minutes without the operator waiting on the machine or the machine waiting on the truck. A KTA1 rated at 12-15 m³ payload (~20-25 t) pairs with a 3-4 m³ excavator bucket for a four-pass load in roughly 4 minutes. Under-matching leaves the truck idle at the face; over-matching leaves the excavator idle while a full truck drives away. We model the pass count against the specific excavator on site before recommending the KTA1 body size, because a one-bucket mismatch can add 30-60 seconds per cycle and that compounds across 40-60 cycles per shift.
The KTA1’s electric drivetrain helps the load itself. There is no clutch to slip under the heavy initial pull from the face, and the LvKong motor’s full torque from zero rpm means the truck pulls away on a graded quarry ramp at full load without the wheelspin or bog-down a diesel exhibits at low rpm. On the soft, variable-grade quarry floor this translates into fewer stuck-truck events and a tighter, more predictable cycle.
Productivity is cycles per shift, and a cycle is load time plus haul time plus dump time plus return time. On a typical Ghana hard-rock quarry the haul is 1.2-2.5 km at 20-35 km/h loaded, the dump is 1.5-2 minutes, and the return is the same distance unloaded at 30-45 km/h. With a 4-minute load and a 6-9 minute round-trip haul, a KTA1 completes a cycle in roughly 12-16 minutes, or 38-50 cycles across a 10-hour shift. At 22 t per load that is 840-1,100 t moved per truck per shift — and the number scales linearly with cycle discipline, not with driver heroics.
| Parameter | KTA1 electric dump truck |
|---|---|
| Payload / body | 20-25 t / 12-15 m³ |
| Traction battery | 350-400 kWh CATL LFP, liquid-cooled |
| Motor | LvKong 360-410 kW peak / 2,400-2,800 Nm |
| Gradeability | ≥30% at full load |
| Typical cycle time | 12-16 minutes |
| Cycles per 10-h shift | 38-50 |
| Throughput per shift | 840-1,100 t |
| Energy intensity | ~1.6-2.0 kWh per tonne-km |
| Battery warranty | 8 years / 4,500 cycles to 70% SOH |
| FOB price band | US$95,000-130,000 |
The energy intensity figure — about 1.6-2.0 kWh per tonne-kilometre — is the productivity metric that survives changes in quarry layout. Multiply it by tonnes moved and by haul distance, and you have the daily kWh draw with no guesswork. A KTA1 hauling 1,000 t over an average 2 km round trip consumes roughly 3,200-4,000 kWh per shift, which the 350-400 kWh pack covers for a full day with a midday opportunity charge, or which a swap configuration covers indefinitely.
The quarry’s signature energy advantage is the grade. Most hard-rock quarries load at the top of a bench and dump downhill at the crusher, so the loaded haul is often a controlled descent and the empty return is the climb. That inversion is gold for an EV: the loaded downhill run regenerates 18-30% of the energy spent on the empty climb, because the 20-25 t of payload does the braking work and the motor captures it as charge. On a bench with a 6-10% average grade over 1.5 km, a KTA1 recovers roughly 8-14 kWh per descent — energy that a diesel truck simply burns into its brake linings.
The maintenance consequence is the quieter one but the larger over a year: brake component life on a regen-heavy quarry duty cycle extends three to four times versus diesel, because the friction brakes are reserved for the final stop. Combined with the sealed drivetrain’s immunity to quarry dust ingestion — no air filter clogging, no turbo soot, no engine oil turning to slurry — the KTA1’s service calendar collapses to brake inspection, coolant check and tyre rotation. In a Ghanaian quarry where dust and heat are the two enemies of diesel uptime, that simplicity is the productivity story as much as the energy saving.
Because the loop is fixed, charging is a plant decision. A quarry running six KTA1s draws up to roughly 2,400 kWh per shift per truck at peak, or about 14-18 MWh daily across the fleet; with managed charging overnight plus a midday opportunity window, the connected load peaks at 1-2 MVA. The practical layout is one 240-360 kW DC unit per 3-4 trucks at the crusher or workshop, plus a bank of AC posts for slow top-up. ECG medium-voltage service at a quarry is a standard industrial connection; we file the application on order day because the 8-16 week lead time exceeds the vessel transit. Solar canopies over the workshop and parking capture Ghana’s 4.5-5.0 peak sun hours to offset 30-45% of annual charging energy and provide shade that extends tyre and cabin life.
Most quarries do not run a single continuous shift; they run a day shift with a midday lull when the batching plant or crusher is serviced, and that lull is the free charging window. A KTA1 returning to the workshop at 40-55% state of charge during the lull can take a 240 kW opportunity charge that restores 20-80% in roughly 50 minutes, then re-enter the cycle fully charged for the afternoon. We schedule the charger controller around the known lull rather than against a fixed overnight window, because the quarry’s daily energy draw is front-loaded into the productive hours. On a two-shift operation the opportunity charge becomes mandatory, and the 350-400 kWh pack is sized precisely so that one midday charge plus an overnight top-up covers the full 20-hour duty without a battery swap.
Tyre and component life is the quiet productivity multiplier. Quarry tyres are the second-largest consumable after diesel on a diesel fleet, and the KTA1’s smoother, torque-linear electric launch reduces wheelspin during the face pull-away, which is where tyres are shredded. Combined with regen-driven brake life of three to four times the diesel norm, the consumables budget on a KTA1 quarry fleet drops materially. We track tyre-hours and brake-hours in the telematics portal alongside energy, so the productivity report a quarry manager sees is tonnes-moved-per-maintenance-dollar, not just litres-saved — the metric that actually decides whether the electric truck earned its place on the bench.
Ghana’s aggregate sector — the Accra and Kumasi peri-urban quarries feeding construction, and the limestone operations near the cement plants — is a textbook KTA1 market. Our Ghana electric truck market page covers the duty treatment, the port transit from Tema, and the grid connection realities. The optimisation discipline is the same everywhere: match the loader, tighten the cycle, exploit the grade for regen, and charge against the shift rather than against the day. A quarry that does all four turns the KTA1 from a clean-truck line item into the highest-throughput, lowest-cost haul unit on the bench — and in a business measured in tonnes moved per shift, that is the only metric that pays the wages.
Ready to electrify your fleet? Contact Shaanxi Fenghan Trading — authorized Dongfeng EV truck exporter. WhatsApp: +86 153 1943 1311 | Email: sales@fenghan-trade.com | dongfengevtrucks.com
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