Magnetic resonance technology set a new course in the wireless power transfer (WPT) sector. WPT is derived from inductive power transfer (IPT) which is developed many decades back. After this much time, the transfer efficiency increased from 70% to more than 95% and transfer distance from few centimeters to several meters. A converging pattern in the trade off between transfer efficiency and the air gap distance is visible in every novel designs. This pattern is achieved through the optimum selection and design of compensator, wireless transformer and the battery packs. As the conservation of energy and exploration of renewable energy resources became a common aspect in every novel technological entities, solar power and fuel cells made its debut to wireless charging. A detailed analysis of different types of wireless charger topologies implemented and proposed in plugged in hybrid electric vehicle (PHEV) charging applications are presented in this paper. The recent attempts to integrate the renewable energy sources to the wireless charging is covered. Two winding model is taken for the analysis of the state of art efficiency. For enhancing the performance of wireless charging system, various compensation techniques are validated based on different topologies. Maximum efficiency and charging condition for a given impedance is explained and derived comprehensively. Different winding designs for wireless transformer is described with comparison. Magnetic coupler selection, battery selection and different safety standards for WPT design are mentioned in this paper.