Why a Truck Needs a Different Motor Than a Car
Truck conversions are not the same as passenger car conversions. A truck's higher curb weight, payload capacity, and continuous-load duty cycle demand a motor with sustained torque output, robust thermal management, and voltage architecture that supports real-world hauling.
Choosing the wrong motor means overheating under load, insufficient torque for hill starts, or a battery system that cannot keep up. This guide maps CMVTE's motor lineup to common truck types so you can select the right unit on the first try.
Electric Motor Comparison for Truck Conversions
| Truck Type | GVWR (lbs) | Recommended Motor | Power / Torque | Voltage | Cooling |
|---|---|---|---|---|---|
| Light pickup / mini truck | 4,000 – 7,000 | CMVTE PMSM 15kW – 30kW | 15–30 kW cont. / 80–150 Nm | 96V – 144V | Air (natural) |
| Medium-duty truck | 10,000 – 20,000 | CMVTE PMSM 60kW – 90kW | 60–90 kW cont. / 250–400 Nm | 312V – 384V | Liquid-cooled |
| Heavy-duty truck / bus | 25,000 – 60,000 | CMVTE PMSM 120kW – 250kW | 120–250 kW cont. / 600–1200 Nm | 384V – 540V | Liquid-cooled |
All CMVTE PMSM motors use internal permanent magnet rotors for high power density and efficiency across the operating range. For truck conversions, liquid-cooled motors are strongly recommended for any continuous load above 30 kW.
How to Select the Right Motor for Your Truck
1. Calculate Required Continuous Power
Use the truck's GVWR and target cruising speed:
P_cont (kW) = (GVWR_kg × 9.8 × Crr × v_m/s + 0.5 × ρ × Cd × A × v³) / 1000
For a rough estimate: plan for 15–25 kW per ton of GVWR for highway-capable performance. A 5-ton truck typically needs 75–120 kW continuous.
2. Match Voltage to Battery Architecture
Higher voltage reduces cable size and current draw. For trucks:
- 96V–144V: Light duty only (mini trucks, small pickups)
- 312V–384V: Medium-duty sweet spot — good balance of efficiency and component cost
- 540V+: Heavy-duty — allows highest power density but requires higher-spec inverter and BMS
3. Verify Cooling Capacity
Truck motors operate under sustained load for hours. Liquid cooling is required for continuous power above 30 kW. CMVTE liquid-cooled PMSM motors maintain full rated output up to 60°C ambient coolant temperature.
4. Check Transmission Compatibility
Retaining the original truck transmission? The motor output shaft must match the input spline and bellhousing pattern. CMVTE offers adapter flanges and couplers for common truck gearboxes including Isuzu, Toyota, Hino, and Tata.
FAQ
Can I use a passenger car motor in a truck conversion?
Not recommended. Passenger car motors prioritize peak power bursts. Truck motors need sustained torque output and thermal endurance. A car motor in a truck application will likely overheat under continuous load within 20–30 minutes of highway driving.
What is the best motor for a Toyota Hilux EV conversion?
A CMVTE PMSM 60kW liquid-cooled motor (312V) pairs well with the Hilux's original 5-speed gearbox and 2-ton payload capacity. See the motor selection for compatible models.
Do I need to change the truck's original gearbox?
Not necessarily. Many truck gearboxes handle electric motor torque well. You need a coupler and adapter plate to connect the motor to the gearbox input shaft. CMVTE provides these as part of the drivetrain package.
What voltage should I choose for a 10-ton truck conversion?
384V to 540V is recommended. At this voltage level, current draw stays manageable (under 300A for 120kW), allowing standard EV-rated cables and connectors.
Does CMVTE provide a complete kit (motor + controller + pedal) for trucks?
Yes. CMVTE supplies matched motor + controller + wiring harness + accelerator pedal sets for each power level. Browse truck conversion kits or contact us for a custom proposal.
Get a Motor That Fits Your Truck
CMVTE manufactures PMSM motors from 5 kW to 250 kW+, all compatible with truck conversion duty cycles. Tell us your truck model, GVWR, and target range — we will recommend the matched motor + controller + cooling set.
Need help sizing a motor for a specific truck model? Provide the truck make, model year, GVWR, and target top speed — we will send a spec-matched quotation within 48 hours.
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