Not all but most of the home appliances internally operate on DC that is obtained after a transformer and a rectifier constituting a major part of the power losses. The increase uses of renewable energy sources for energy generation become widespread which require DC/AC converter. Therefore there are lots of places that you will lose energy and be inefficient. Nowadays with the advanced research in power electronics components, generation of electricity in DC by solar PV and a fuel cell that eliminates the rectification process. Transformers are replaced by the power electronics buck-boost converters. DC circuit breakers have solved the protection problems for DC distribution system. Such kinds of technological change have the possibility of requiring electrical appliances that receive DC input from home that allow the direct use of DC from onsite DC sources, thus avoiding the energy losses from converting DC power to AC and back to DC. The study starts with an introductory overview of losses in the cables and their dependence on voltage level, cable cross-sectional area, and transmitted power. The case study shows that main losses in the overall system generally occur in power converters. This leads to the investigation of efficiencies in power converters. As part of the process to investigate DC supply system for home appliance MATLAB simulation software and straightforward mathematics are used. In this paper 48V, DC is proposed as an optimum voltage for home distribution. Proposed DC system diminishes the power conversion stages, reduces the associated power losses by 29.05%, and improves the overall system efficiency from 0.51% – 31.45% range for various devices and has validated the cost-benefit of manufacturing the DC devices than AC devices. The assessment of all these shows that a conventional AC system can be replaced by a DC system that has many advantages by cost as well as by performance.