An installation for recharging an energy storage means, such as a battery of an electric vehicle, by conduction of energy from an electric power source to the energy storage means, where the battery is electrically connected to an on-board device and provided with a plurality of electric contacts, and on the ground, a ground device, combined with the on-board device, is connected to the electric power source and includes a plurality of electric contacts, each electric contact of the ground device being able to be put into contact with a corresponding contact of the on-board device, and the installation being able to safely apply an electric recharging power issued by the electric power source to the battery, where the plurality of electric contacts of the on-board device and of the ground device exclusively includes a phase contact and neutral contact.