Autonomous Tractor Corporation has developed an after-market electric drivetrain system that can be installed on a variety of agricultural vehicles (tractors, self-propelled implements, etc.) The system includes proprietary electric motors, a communication system to tie all of the components together and a proprietary Variable Torque Controller that controls the generator and electric motors. ATC supplies these systems to dealers who perform the installation and support services to the end customers. Most of the components ATC uses are off-the-shelf and sourced from large suppliers. A typical 4-motor system can be assembled in approximately one week and installed in approximately one week. Currently ATC is working with dealers to install the system on four older-model John Deere tractors.