A vehicle mounted AC generator system having an AC generator mounted driven by the vehicle's power-take off having a secure control system. The secure control system integrates with the AC generator, the power-take off and the vehicle to enable the generator to be operated by the vehicle's engine while the cab or passenger compartment of the vehicle remains secured, thereby preventing the potential for theft or accidental input which may create a dangerous condition. The secure control system also provides monitoring of the generator's operation and emergency stop capability to shut down both the generator and the vehicle's engine in the event required.