A control algorithm for a standalone solar photo-voltaic (PV)-diesel-battery hybrid system with FUZZY is implemented in this paper. The proposed system deals with the intermittent nature of the energy generated by the PV array and it also provides power quality improvement. The MPPT controller is employed to achieve the maximum power point (MPP) for photovoltaic (PV) panels. The PV array is integrated through a dc-dc boost converter and is controlled using a maximum power point tracking algorithm to obtain the maximum power under varying operating conditions. The battery energy storage system (BESS) is integrated into the diesel engine generator set for the coordinated load management and power flow within the system. Solar photovoltaic (PV) system has gained its own importance in global electrical power generation. PV system may be connected in I. INTRODUCTIONA global transition to renewable energy resources is well suited to meet the need for power in remote areas, which lack grid and road infrastructure. The support for the use of renewable energy resources is increasing as global warming is a major environmental concern, and it offers an alternative for future energy supply. Among the available renewable energy resources, solar photovoltaic (PV) power generation is gaining wide acceptance, and it is used for various applications such as household appliances, remote missions, data communications, telecommunication systems, hospitals, electric aircraft, and solar cars. The utilization of the PV power generation is for the reason that it has many advantages such as it gives clean power, is portable in nature, and can be employed for various small-scale applications. However, considering the large fluctuations in the output of PV power, it is imperative to integrate other power sources like a diesel generator (DG) set, battery storage, fuel cells, etc. [2,3] Due to reserve of fossil fuel dwindling and the global warming effect looming large, alternative energies become popular. The most attention of alternative energies is solar energy. There are two types of technology that employed solar energy, namely solar thermal and solar cell. A PV cell (solar cell) converts the sunlight into the electrical energy by the photovoltaic effect. Energy from PV modules offers several advantages, such as, requirement of little maintenance and no environmental pollution. Recently,PV arrays are used in many applications, such as, battery chargers, solar powered water pumping systems,grid connected PV systems, solar hybrid vehicles and satellite power systems. Since PV module has nonlinear characteristics, it is necessary to model it for the design and simulation of maximum power point tracking (MPPT) for PV system applications [1].The performance analysis of standalone systems with PVand DG-based sources is given in. The design and operation of standalone DG-SPV-battery energy storage (BES) using a peak detection based control approach [4] An enhanced phase-locked loop (EPLL)-based control approach is shown, wherein th...