A complete high voltage EV powertrain: the NetGain Hyper 9 HV motor, an SME AC-X144 controller, and the accessories needed to put them into a vehicle.
Buying a motor and a controller separately is where conversions go wrong. The two have to agree on voltage, current, the resolver or encoder interface, the cooling arrangement and the control strategy, and a motor that works and a controller that works do not automatically make a drivetrain that works. A matched kit removes every one of those decisions.
The Hyper 9 is a synchronous reluctance internal permanent magnet motor, which is a mouthful for a design that combines two ways of producing torque. It gets efficiency and a wide constant power band from the reluctance side and torque density from the magnets, which is why it has become one of the standard choices for light and medium weight conversions rather than a specialist option.
The HV designation matters. This is the high voltage version, paired with the AC-X144 controller, so it suits a pack in the higher voltage range rather than a 96 V class system. Higher pack voltage means lower current for the same power, which means smaller cables, smaller contactors and less heat everywhere.
It is a powertrain, not a car. You will still need a pack, a BMS, a charger, a DC to DC converter, a cooling system, an adaptor plate to your gearbox and a throttle. This is the part in the middle that turns electricity into movement.
Key specifications
| Part | HYPER9KITHV144V |
|---|---|
| Motor | NetGain Hyper 9 HV |
| Motor type | Synchronous reluctance internal permanent magnet, SRIPM |
| Controller | SME AC-X144 |
| Suits | Light to medium weight vehicles |
| Weight | 90 kg |
Features
- Motor and controller matched as a system, so there is nothing to specify or reconcile
- SRIPM design, with efficiency and a wide constant power band as well as torque density
- High voltage version, so currents and therefore cable and contactor sizes stay manageable
- Accessories included, so the kit is closer to installable than a bare motor
- The most widely used conversion drivetrain in its class, so support and knowledge are available
Compatibility
For light to medium weight vehicle conversions running a high voltage pack.
You will also need an adaptor plate and a coupling to join the motor to your gearbox. We make plates for common applications, including the air cooled VW Beetle transaxle, and the Hyper 9 motor cradle is the matching mount. The SME controller coolant plate is how the controller is cooled.
Talk to us before ordering. At this price, and with the rest of the build depending on it, it is worth confirming the vehicle, the target pack voltage and the gearbox with us first. A powertrain that is right for the car is a different question from a powertrain that works.
In the box
- 1 x NetGain Hyper 9 HV motor
- 1 x SME AC-X144 controller
- Accessories, contents list on request
Downloads
Motor and controller documentation is in the Documents tab.



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