The Plant Electrical System (PES) of the European DEMOnstration fusion power plant (DEMO), presently under conceptual design, shall supply power to the loads and deliver net power to the Power Transmission Grid (PTG). Starting from the available requirements, the applicability to DEMO PES of the technologies and design approaches adopted in ITER and nuclear power plants (NPP) has been evaluated. This article presents the results of the survey and proposes alternative solutions to deal with the identified criticalities.