The objective of this effort is for Enginuity to develop a Ruggedized Integrated Hybrid GenSet (RIHGS) 2-5 kW load following variable output power/energy system into a lightweight JP-8 fuel burning engine. The First Phase of this effort will include the use of a model / simulation tool and analysis to evaluate alternative electro-mechanical and hybrid technologies to incorporate into the Enginuity modular load-following, variable output power/energy system. This system configuration will be driven by an EPS diesel-powered 500cc engine to generate a load following variable output of 2-5 kW of tactical electric power for Soldier, UGS, and remote applications. The Enginuity modular load-following, variable output power/energy system has been identified for adaptation for tactical environments, operational and functional characterization, and demonstration in a relevant environment. The solution is based on the use of a patented inwardly opposed four stroke engine specifically designed for hybrid applications. The system is highly power dense with a low parts content, low vibration, and low noise < 70 dBA at 7 m and thermal signature. The engine driven system shall be integrated with state-of-the-art power electronic controls and COTS battery system 6.7 kWh (lithium nickel manganese cobalt oxide) to increase energy efficiencies, while supporting significant size and weight reductions (30% or more). A modular man-portable building-block-approach will allow for standalone power and energy operation and, when integrated, continuous load following power with sufficient energy to support peak shaving, silent watch, and battery recharge operation thereby increasing warfighter capability, reliability and safety. This power generation system will be capable of providing a load following variable output at 2 to 5 kW of full continuous power at 4000 95oF. Results of Phase I will support the development of a hybridized genset driven by the EPS 500 CC engine configuration and its integration with optimal combinations of power systems components / subsystems to realize a modular load-following, variable output (2-5 kW) power system design for prototype development in Phase II. Phase I discussions and design will include the following elements: Narrative and graphical depiction of the design Projected physical attributes (power density, energy density) Projected performance metrics (fuel consumption, power output, etc.) Optimized system Controls (Auto Start, load following capability) Identification of the Technology Readiness Level of the technology