This document summarizes a presentation given at the 4th International Conference on Advances in Energy Research held at the Indian Institute of Technology Bombay in India on October 10, 2013. The presentation discusses enhancements to a thermal storage system for domestic use through the use of phase change material (PCM). Specifically: - An experimental investigation of a 10 liter per day capacity thermal storage system found that including PCM occupying 26% of the volume improved the thermal storage capacity by 22% compared to a system without PCM. - The PCM used was HS-58, which has suitable thermal properties for domestic solar water heating systems. - Temperature time data from the experiments show that the system with PCM maintained