Abstract: A set of transport vehicles for an automatic storage facility having a transfer cart having wheels and being capable of running on rails, and capable of carrying a shuttle, the shuttle having wheels and being capable of leaving the transfer cart and being capable of collecting, carrying, and leaving goods stored in a storage aisle wherein the shuttle includes: at least one shuttle electric motor, a first capacitor bank to provide energy to power the at least one shuttle electric motor, and a first connector organ to electrically connect the shuttle to the transfer cart and in that the transfer cart comprises includes: at least one transfer cart electric motor, a second connector organ to electrically connect the shuttle to the transfer cart, a second bank of capacitors to provide energy to charge the shuttle first bank of capacitors, via the connector organs, when the shuttle is carried by, and connected to the transfer cart.