EV - Build
QS motors offers a retrofit kit that includes all needed components, such as the instrument cluster, throttle, motors, controllers, disk brakes, gear switch and hardware for the wiring harness. Only the batteries must be sourced separately.
After gutting all parts of the ICE the electric drive train is installed:
- 2 wheel hub motors, 5 kW each, with disk brakes in the rear
- 1 controller for each hub motor
- 2 batteries, 20 Ah capacity, 40 A continuous current, 120 A peak current
The project is performed exclusively in my garage ( a big shout out to my patient neighbors). The upgrades to the shop include a welder, a drill press and a few other tools. A few pictures of the build process are below. The motor mounts were made from square steel tubing and welded to the frame.
Throttle, gear switch, instrument cluster and DC/DC converter are part of the kit from QSM
The 5 kW hub motors arrive with disks attached from QSM
Controller and disk brakes set deform QSM
ATV gutted from all part of the past..
Building the motor mount from square tubing with a drill press and my first ever welds.
Motor mount fitted to the motor and welding on the bracket for the disk brake.
Instrument cluster fitted and cables wired. It start coming alive...
Wiring the controller cables and connecting both motors in parallel
drive train done!!!
controllers (silver) mounted to the frame and batteries (blue)
Probably the most important part of building an electric vehicle. Connect the batteries in a safe way, wire the controllers and instrument cluster, install charger interfaces, fuse box and 72V to 12V DC-DC converter. I also want to use it in the city and need to comply to Montana law, which allows ATVs to be registered and drive on public roads, if they have headlights, turn signals, horn and meet a few other regulations.
Wiring schematics of the vehicle.
Wiring diagram of the controller & motor, specific to the 5 kW hub motor from QSM.