Port drayage is the least glamorous and most predictable trucking job in the world — and that predictability is exactly why it is the first place electrification pays. A drayage tractor repeats the same short loop all day: collect a box at the terminal gate, haul it a few kilometres to an inland container depot (ICD), drop, collect an empty or export box, return. No long highway unknown, no variable payload surprises, no remote breakdown risk. For a terminal operator or a dedicated drayage fleet, that fixed duty cycle is the ideal canvas for a battery-electric truck.
The SAGMOTO i9 electric platform is built for exactly this mission. This guide models the i9's drayage economics honestly — including the parts where diesel still wins.
Why Drayage Is the Perfect Electric Duty Cycle
Electrification struggles where routes are long, variable and remote. Drayage is the opposite on every axis:
- Short loop: 10–40 km round trip per cycle, so daily energy needs are bounded.
- High cycle count: 10–20 shuttles per shift means the truck is working constantly — exactly when electrification's low per-km cost compounds.
- Regenerative braking: the loaded-return and terminal-slowdown legs recover energy, padding real range.
- Fixed base: the depot is known, so charging infrastructure can be planned, not improvised.
- Emissions rules: major ports are rolling out low-emission (LEZ) and zero-emission (ZEZ) zones that penalise or exclude diesel drayage.
i9 Drayage Configuration
| Parameter | i9 electric drayage spec | Drayage rationale |
|---|---|---|
| Powertrain | Battery-electric, fixed-ratio or 2-speed reduction | Full torque from 0 rpm, ideal for stop-go |
| Battery | Sized to 150–400 km daily + margin | Covers 10–20 shuttles per shift |
| Charging | Depot AC/DC, opportunity top-up between shifts | Fixed base enables planning |
| GVWR / axle | Rated for loaded container gross | 20-ft / 40-ft box up to ~26–30 t on chassis |
| Cab | Day cab, terminal-visibility package | Short hops, frequent shunts |
| Telematics | Charge + duty-cycle monitoring | Dispatchers plan around state-of-charge |
Range, Payload and the Real Constraint
Two numbers matter, and only one is the battery:
| Factor | Drayage value | Note |
|---|---|---|
| Cycle distance | 10–40 km round trip | Terminal ↔ ICD |
| Cycles / shift | 10–20 | High utilisation |
| Daily range need | 150–400 km + margin | Battery sized to this |
| Loaded gross | ~26–30 t on chassis | Container + chassis weight |
| Binding limit | GVWR / axle, not battery | Spec axle rating first |
Because a loaded container is heavy, the chassis GVWR and axle ratings — not battery size — usually set the practical payload. Spec the i9's axle and frame for the loaded box, then size the battery to the shift's energy need with a comfortable reserve for air-conditioning and queueing at the gate.
The Economics: i9 Electric vs Diesel Drayage
Indicative per-shift comparison, depot-based drayage, 12-hour shift:
| Cost element | i9 electric | Diesel equivalent | Lever |
|---|---|---|---|
| Energy / shift | Low (tariff electricity) | High (diesel per km) | Electricity $/kWh ≪ diesel $/L |
| Maintenance | Lower | Higher | No oil; regen extends brakes |
| Emissions compliance | ZEZ-ready | May pay LEZ fees | Port zone charges |
| Upfront | Higher | Lower | Battery cost |
| Charging infra | Required (capex) | None | Plan at depot |
On a pure per-km basis the i9 usually wins decisively: electricity is a fraction of diesel cost, and maintenance is reduced by the absence of oil changes, exhaust and complex transmission. Those savings are largest precisely on the high-cycle, low-speed drayage profile. The offset is the higher purchase price and the need for depot charging — but because the route is fixed, the charging plan is a one-time engineering problem, not a daily uncertainty.
Charging Strategy for a Terminal Operator
- Opportunity top-up: a DC charger at the depot tops the i9 during driver breaks and load waits, extending effective daily range.
- Overnight full charge: a slower AC/DC session between shifts returns the battery to 100% before the next day.
- State-of-charge dispataching: telematics tell the dispatcher which truck has margin for a long shunt and which should take the short loop.
- Reserve planning: keep a diesel or a second electric as swing capacity during peak or fault.
Where Diesel Still Wins (Honesty Check)
The i9 is not universal. Diesel remains preferable when:
- The drayage extends to long, variable regional hauls beyond battery range.
- Depot charging cannot be permitted or financed in the near term.
- Payload swings are extreme and the chassis is at GVWR with a heavy box plus battery weight.
For the classic terminal-to-ICD shuttle, however, the i9's case is strong and getting stronger as ports tighten emission zones.
i9 in the SAGMOTO New-Energy Range
The i9 is the electric platform in SAGMOTO's new-energy family, suited to drayage, port shuttle and dense urban distribution. The full lineup is on the SAGMOTO new energy trucks page, with spec sheets and export configuration for electric and other zero-emission applications.
Shaanxi Fenghan Trading Co., Ltd. is the factory-authorized exporter (SHACMAN certificate SQIDACN 28; SAGMOTO certificate SAG-2025-201). For an electric drayage deployment, the authorized channel provides genuine battery and drivetrain documentation, warranty registration and the technical backing a terminal operator needs to plan charging with confidence.
Total Cost of Ownership Over the Asset Life
A drayage operator should model the i9 over its full working life, not just the purchase invoice. The shape of the TCO is unusual for an electric truck:
- Year 1–2: the higher upfront cost and charger capex sit on the books, while energy and maintenance savings begin accruing from the first shift.
- Year 3–5: savings compound. With no diesel price exposure on the drayage loop, the operator is insulated from fuel volatility that hits diesel rivals every quarter.
- Year 5+: battery health decides residual value. Specifying the right battery size (not the largest) and managing charge cycles protects capacity and therefore resale.
For a terminal operator running a fixed, high-cycle loop, the crossover point where cumulative savings overtake the higher purchase price typically arrives well within the asset's life — often inside three years at current diesel and electricity ratios. The decisive risks are not technical but organisational: securing depot power, training shunt drivers on electric torque delivery, and planning around state-of-charge. The full SAGMOTO electric lineup, including the i9, is on the SAGMOTO new energy trucks page.
FAQ: i9 Electric Trucks for Port Drayage
Q: Is the SAGMOTO i9 electric truck suitable for port drayage?
A: Yes, for the right duty cycle — short, repetitive terminal-to-depot shuttles where the range is predictable, regen recovers energy, and zero emissions help meet port zones.
Q: What range and payload does the i9 drayage truck need?
A: A 150–400 km daily range with margin; payload must cover a loaded container up to ~26–30 t gross, so axle rating and GVWR are the binding constraint.
Q: Does an electric drayage truck save money vs diesel?
A: On energy and maintenance, yes — electricity per km is a fraction of diesel and upkeep is lower. The trade-off is higher upfront cost and depot charging infrastructure.
Q: Where can I see SAGMOTO's electric truck range?
A: The full new-energy lineup is on the SAGMOTO new energy trucks page.