How to Plan an Electric Truck Duty Cycle for Port Container Haulage

Define the port duty cycle before selecting a truck

Port container haulage can mean several different jobs. A road tractor may move containers between a seaport, off-dock yard, warehouse or inland depot. A terminal tractor may move trailers within a controlled yard. These jobs have different speeds, distances, coupling patterns, access rules and vehicle requirements. Do not treat them as interchangeable when writing a vehicle specification.

Draw each route and list every trip stage. Record loaded and empty kilometres, container and trailer type, gross combination mass, number of moves per shift, time at gates, terminal queues, inspection stops, coupling and uncoupling, loading or crane dwell, driver breaks and return-to-base time. Note which legs are on public roads and which are inside controlled facilities. Include the shift calendar, weekend pattern and seasonal changes.

Use timestamped logs where possible. “Eight trips per day” is less useful than departure, gate-in, gate-out, loading completion and charger-connection times for each trip. Averages describe the fleet; the longest routine shift and late-return cases help size energy reserve and charging windows. Keep exceptional disruption days separate from normal operations, then model a reasonable contingency.

Use a real tractor configuration as a reference

The Dongfeng catalogue lists a TE46/TE4Z 4×2 tractor reference with 42 t gross combination weight (GCW), CATL 400 kWh battery, 315 kW rated / 510 kW peak motor output, four-speed AMT and dual-gun 500 A DC charging. Some entries are grouped across models, so confirm every value against the exact vehicle code and destination-market order.

GCW is not payload, and battery capacity does not establish route distance. The listed road tractor is a reference for haulage assessment, not evidence that it is an approved terminal tractor or suitable for a specific port. See the TE46 port and short-haul guide.

Build an energy budget from measured moves

For each route class, calculate traction and stationary energy from representative vehicle records or an instrumented pilot. Separate loaded and empty legs. Log distance, mass, speed, elevation, stops, queue duration, ambient temperature, cab climate use and any trailer equipment powered by the truck. Compare energy across shifts and drivers, preserving the conditions behind each observation.

A planning equation can organize the data: daily energy equals the sum of measured energy for each route segment plus measured auxiliary and idle use. This is a bookkeeping framework, not a substitute for vehicle measurements. Avoid transferring consumption from a lighter combination, another port or a different road profile. Do not assume regenerative braking offsets a descent by a fixed amount; recovery depends on the vehicle, state of charge, speed, controls and conditions.

Define a fleet reserve for a delayed gate, diverted route, charger outage or late return. Ask the vehicle supplier for the ordered battery's usable-energy definition and operating guidance. Run a typical case and a demanding routine case. If the plan only works when every queue is short and every return is on time, the schedule needs more charging or operational margin.

Schedule charging around the terminal timetable

Map vehicle availability against charging availability. A truck that is parked may still be waiting for a driver, trailer, inspection, cleaning or dispatch instruction. Record arrival and departure windows and identify whether charging can occur during predictable dwell without blocking the next move. If en-route charging is proposed, verify location, access, connector, uptime, queue risk and vehicle acceptance first.

Ask the vehicle and charger suppliers to reconcile the catalogue current entry with voltage, power, connector, protocol and charge curve for the ordered build. Current alone does not provide charge time. Have a qualified electrical professional review depot service capacity, transformer, protection, cables, charger positions, bay geometry and future fleet demand. When several tractors return together, analyze simultaneous power and a practical charging sequence.

Port safety and traffic flow matter. Place charging bays so cables do not cross vehicle paths or obstruct emergency access. Coordinate charging windows with terminal operators and drivers. Assign responsibility for charger checks, fault escalation, restart decisions and fallback dispatch when equipment is unavailable.

Verify port access and combination constraints

Access is site specific. Confirm terminal credentialing, vehicle registration, safety equipment, permitted dimensions and mass, appointment or gate processes, security procedures and local clean-truck rules with the relevant port and authorities. The Port of Los Angeles truck-access page, for example, publishes its own requirements; this is a local example, not a rule for ports elsewhere. Check current requirements where the vehicle will operate.

Review the actual tractor and trailer together: fifth-wheel position, coupling height, turning envelope, axle loads, braking connections, tyre specification, ramp grip and overhead clearance. Confirm whether the route includes public-road bridges, restricted streets or low-speed ramps. Obtain local approvals in writing when required. A manufacturer configuration table cannot grant route permission.

Run a pilot that answers dispatch questions

Agree on a representative pilot with operations, terminal staff, drivers, vehicle supplier, charger provider and electrical team. Choose a normal demanding shift, define the combination and route, verify site readiness, and set the SOC reserve and charging rules beforehand. Capture timestamps, energy, payload or GCW, queue time, missed moves, charger events, driver feedback and maintenance observations.

Measure whether the truck completes the planned work, returns with the required reserve, connects to charging safely and is ready for the next dispatch. Separate equipment downtime from gate or terminal delays. Review route or trailer changes before extrapolating results. One demonstration run is not a fleet-wide range guarantee.

Port electric truck planning checklist

• Clarify road drayage versus terminal-yard movement and required vehicle category.
• Map loaded and empty legs, moves per shift, gate queues, dwell and turnaround.
• Record trailer, cargo, loaded mass, axle distribution, grades and route access.
• Obtain exact model-specific battery, usable energy, charging curve and connector.
• Survey depot power and charger placement with qualified site professionals.
• Verify current port entry, local registration, mass, dimension and safety rules.
• Set reserve, charger outage procedure, service coverage and driver training.
• Use a measured pilot before setting daily dispatch commitments.

For review, send the country, terminal, trailer, route map, shift schedule, target GCW and charger details through the configuration enquiry page. The U.S. DOE fleet planning checklist advises assessing duty requirements and charging needs with utilities and equipment providers.

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