The contemporary energy-efficient transformers are designed differently from conventional transformers which increase their capabilities for minimizing energy losses. The conventional transformers were constructed using silicon alloyed iron core, whereas the efficient transformers are made up using amorphous material, i.e., a metallic glass alloy for the core. With a slight change in construction materials, the expected reduction in energy losses is approximately 70%. The unique physical and magnetic properties of these transformers have even increased efficiency levels at low loads like 98.5% at a load level of 35%.