During any travel, vehicles present movements along their vertical axes due to road roughness, curved trajectory, braking, acceleration and inertial forces. The ordinary task of shock absorbers is to absorb the vertical oscillations, providing comfort to the driver, always maintaining the vehicle stability. In particular, the active ones offer the possibility to change the damping coefficient and the chassis lifting. The present study analyses regenerative hydraulic active shock absorbers, i.e. active shock absorbers able to recover the vibrational energy into electrical one and focuses on the design of a device able to route the recovered energy from the four corners shock absorbers into a battery.