the present invention provides a hybrid conversion module configured to easily attach to existing powertrain components in order to produce a light hybrid vehicle . the hybrid conversion module includes an electric motor / generator operable to transmit power to a torque converter and thereby drive the light hybrid vehicle . a storage device such as a battery is operatively connected to the electric motor / generator and is configured to transmit energy to or receive energy from the electric motor / generator . a clutch is configured to selectively decouple the light hybrid vehicle &# 39 ; s engine from the torque converter such that the vehicle can be powered by the electric motor / generator in an efficient manner . the apparatus of the present invention also includes a light hybrid vehicle having such a hybrid conversion module attached in the manner described to a conventional powertrain .