An electric motor-driven rotary disc cutter module for use in a cutterbar in an agricultural harvester. In one embodiment, each rotary disc module includes an electric motor driver for the rotary cutterhead. Individual cutterhead modules are staggered fore and aft along the cutterbar to provide continuous cutting across the lateral width of the cutterbar without requiring synchronized rotation of the cutterheads to prevent contact of the knives. This configuration allows for individual speed and/or rotational direction adjustment for each cutterhead to optimize crop cutting performance and/or crop movement within the header. A control system may be included to monitor performance and manage individual operation of the cutterhead modules.
