This paper presents an extension of HSSD, called HSSD off-grid, to DEG systems design with energy storage considering off-grid systems. The goal of the DOE Energy Storage Program is to develop advanced energy storage technologies, systems and power conversion systems in collaboration with industry, academia, and government institutions that will increase the reliability, performance, and sustainability of electricity generation and. From our experiences at Mayfield Renewables, we'll stipulate that most microgrids share these four features – all within a defined boundary: Distributed energy resources (DERs): local (on-site) energy storage and generation sources that can function independently from the centralized, bulk power. In this article, you will find the three most common solar PV power systems for domestic and commercial use. For simplicity we draw a single phase system but the concept is applicable for three phase system with one (3-phase) or multiple inverters in parallel. Grid will support entire load. Microgrids are localized electrical grids with specific boundaries that function as single controllable entities. Four case studies are evaluated considering different energy resources: a non-intermittent source from a biomass generator.