An apparatus for transferring power to an electrical load, comprising: a charging device comprising an assembly of at least three transmitting armatures, and a primary electrical circuit able to connect each transmitting armature to a tension generator, a user device, separate and independent from the charging device, which comprises the electrical load, at least a pair of receiving armatures (140, 141), and a secondary electrical circuit able to connect the receiving armatures (140, 141) to the electrical load, the pair of receiving armatures being faceable to at least a pair of transmitting armatures of the charging device realizing there-with at least two distinct electrical capacitors (165, 166), an electronic system for monitoring and selecting, connected to the primary circuit of the charging device, which electronic system is configured so as to identify a first sub-assembly of transmitting armatures which face an armature of the receiving armatures of the user device, and so as to identify a second sub-assembly of transmitting armatures which face the other receiving armature of the user device, and an electronic command system connected to the primary circuit of the charging device, which is configured so as to command the primary circuit to apply, between the transmitting armatures of the first and the second sub-assembly, a difference in electrical tension that is periodically variable over time characterized in that the primary electrical circuit of the charging device comprises: a first and a second electrical conductor (200, 205), which are electrically connected to the tension generator in such a way as to be subjected to a constant difference of electrical tension, and a plurality of excitant electrical modules connected in parallel between the first and the second electrical conductor (200, 205) and singly connected to a respective transmitting armature, each of which comprises an inductance and a switch connected in series and between which a central node is comprised that is electrically connected to the respective transmitting armature. a charging device comprising an assembly of at least three transmitting armatures, and a primary electrical circuit able to connect each transmitting armature to a tension generator, a user device, separate and independent from the charging device, which comprises the electrical load, at least a pair of receiving armatures (140, 141), and a secondary electrical circuit able to connect the receiving armatures (140, 141) to the electrical load, the pair of receiving armatures being faceable to at least a pair of transmitting armatures of the charging device realizing there-with at least two distinct electrical capacitors (165, 166), an electronic system for monitoring and selecting, connected to the primary circuit of the charging device, which electronic system is configured so as to identify a first sub-assembly of transmitting armatures which face an armature of the receiving armatures of the user device, and so as to identify a second sub-assembly of transmitting armatures which face the other receiving armature of the user device, and an electronic command system connected to the primary circuit of the charging device, which is configured so as to command the primary circuit to apply, between the transmitting armatures of the first and the second sub-assembly, a difference in electrical tension that is periodically variable over time characterized in that the primary electrical circuit of the charging device comprises: a first and a second electrical conductor (200, 205), which are electrically connected to the tension generator in such a way as to be subjected to a constant difference of electrical tension, and a plurality of excitant electrical modules connected in parallel between the first and the second electrical conductor (200, 205) and singly connected to a respective transmitting armature, each of which comprises an inductance and a switch connected in series and between which a central node is comprised that is electrically connected to the respective transmitting armature. a first and a second electrical conductor (200, 205), which are electrically connected to the tension generator in such a way as to be subjected to a constant difference of electrical tension, and a plurality of excitant electrical modules connected in parallel between the first and the second electrical conductor (200, 205) and singly connected to a respective transmitting armature, each of which comprises an inductance and a switch connected in series and between which a central node is comprised that is electrically connected to the respective transmitting armature.