<p>The cost of energy is one basic input that needs to be reduced optimally. Excess energy use makes multi-dimensional impact on energy cost and environment. Energy cost could be reduced by several means such as increasing the energy efficiency, productivity, quality of end products, etc. This article highlights that if the energy need of processes is met in electrical domain, power electronics (PE) can help optimize the energy use at multiple stages of energy delivery mechanism such as at source, during power conditioning, during its transmission to or distribution in load. Like in electric vehicle (EV), it should be utilized at the load end efficiently and environment-friendly manner. This article elaborates that the same can be achieved through use of domain specific efficient PE converters. This practical article details with three examples involving different application domains where different avenues for improvement are explored. First, the article details how a change in energy source for a process brings large benefits. In the second, it covers how PE controls the energy utilization in the load to boost the energy efficiency in the process. Thirdly, it details that proper choice of power converter for dynamic power flow control boosts energy efficiency to reduce the energy cost.</p>