A mobile shredder comprises a truck having an enclosure providing a storage volume for storage of shredded material, and a rotary shredder mounted in the enclosure outside the storage volume. A prime mover is disposed in an engine/transmission compartment of the truck. An electric motor is disposed outside the engine/transmission compartment and has an output shaft mechanically coupled to an input shaft of the rotary shredder. The rotary shredder is driven solely by the electric motor. An AC generator disposed outside the engine/transmission compartment is driven by the prime mover to generate the electrical power that powers the electric motor. The AC generator is configured to have a rated power output of about 90 to 180 kVA. The rotary shredder is configured to have a shredding capacity of 3000 to 6000 pounds per hour of typical mixed office waste when continuously operated at a nominal rated speed.

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