Grid in the current era is witnessing a rapid integration of innovative technologies. Renewable Energy Sources (RES) are being introduced on a large scale along with the implications related to these sources. One of the important aspects of the RES is its intermittency. The introduction of Battery Energy Storage System (BESS) in distribution systems is therefore very essential. BESS is utilized for improving grid parameters and for straightening the load curve. BESS helps reduce the effect of RES intermittency on the grid and improves reliability. Optimal Sizing and Placement (SaP) of BESS can help improve the system’s economics and reduce the power losses in the system. In this paper, BESS SaP is optimized for the standard IEEE 33 bus system. Different approaches are used for obtaining the optimized placement and size of BESS. Manta Ray Foraging optimization (MRFO) method is used to obtain the optimal solution. MATLAB is used for implementing the optimization methods.