Energy is considered a resource for survival. The demand and supply of natural resources used to generate, transmit, and consume the power make the puzzle for the human race even more complex. Other physical elements like water, copper wiring, electric cars, nuclear power plants, oil platforms, consumer tablets, and buildings to name a few are attached to the energy ecosystem adding mass confusion to a system failing to keep up with the global changes. This paper deals with a methodology for designing a smarter power and energy management system, following the V-cycle. It focuses on building a model using systems modeling language (SysML). The application of systems engineering process in power and energy is presented in this paper as well as the devices in the systems which are going to have a software component enveloping the digitization and proliferation of better, faster, and more effective ways of reusing our best practices in systems engineering. This paper introduces a system-of-systems engineering approach codified in client power management software needed for the urgent transformation of global power systems.