Abstract: An energy conversion and accumulation device, for the conversion of environmental energy into electric energy, includes a transducer, able to convert external environmental stress into an electric quantity, a storage element to accumulate and/or transfer the electric quantity to an electric device, a first switch element, activated in order to transfer electric energy from the transducer directly to a temporary storage element, and a second switch element activated in order to transfer electric energy stored by the temporary storage element directly to the storage element. The device further includes a sensor element, associated with the transducer, temporary storage element, and storage element.