Abstract: Methods, systems, and techniques for wireless and single-conductor power transfer. A single-ended resonator receives power from an alternating current power source and inductively transfers this power to a receiving coil, which may be double ended. A reactive tuning network may be coupled in series, parallel, or a hybrid series-parallel configuration to the resonator and used to tune the resonant frequency of the resonator. Additionally or alternatively, matching between the receiving coil and a load connected to the receiving coil may be done adaptively and in real-time in response to changes in operating conditions. An arbitrarily shaped conducting structure, such as an oil rig, a table, or a shelf, may be used for single ended power transfer to the resonator.