KersTech, Inc. develops hybrid-hydraulic retrofit systems combining electric and hydraulic drivetrains to boost efficiency, extend EV range, and reduce emissions in heavy-duty fleets through regenerative braking and torque assist.

1. TwinTorq electric-hydraulic motor / drivetrain module: Combines a hydraulic torque pathway with electric motor function to offload battery demand during low-speed torque and regen phases, improving efficiency 25–45% over conventional electric motors. 
2. Hydraulic torque system for Class 4–8 retrofits: A modular hydraulic torque assist system designed for heavy-duty trucks and buses operating in intense start/stop duty cycles; manufactured in the U.S. and marketed for retrofit or OEM integration.
3. Vehicle systems integration for heavy-duty EV / HHEV platforms: KersTech positions itself as a system integrator for heavy trucks and buses, adapting its hydraulic modules into vehicle drivetrains and chassis platforms. 
4. Scalable module design for multiple vehicle classes: Their hydraulic/electric drivetrain modules are scalable across a wide mass range (e.g. from forklifts up to trucks and buses), targeting reuse across platforms. 

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Company Resources
Web Links - Hybrid Hydraulic Advanced Energy Regenerative Drivetrains