1 Comparative Energy Analysis of Some Outlets of a Major Quick Service Restaurant in Ibadan, Nigeria Diji C. J. and Ayeni B. Department of Mechanical Engineering, University of Ibadan, Ibadan, Nigeria. chuksdiji@gmail.com , boluayeni@gmail.com Abstract Restaurants are among the most intensive energy users of all types of commercial building due to long hours and high operating loads. Their energy demand is almost always as high as the connected load; therefore, energy maximization in these restaurants is essential. In this study, comparative energy analysis of four outlets of a major Quick Service Restaurant in Ibadan, Nigeria is presented. Study locations include: Iwo road, Ring road, Mokola and Bodija. Connected load and energy demand of each location together with cost of self generation was analyzed. The findings reveal that average cost of self-generation is N55/kWh, an average of N33/kWh is lost whenever there is power outage. Iwo Road is the most energy-inefficient outlet based on a high volume of diesel consumption that could not be accounted for while Ring Road shows the most competitive energy cost because of better availability of power from utility-IBEDC (Ibadan Electricity Distribution Company). Great energy can be saved by retrofitting and better management process. Keywords: Restaurant, self-generation, connected loads, energy demand and Retrofitting 1. Introduction Restaurants are among the most intensive energy users of all types of commercial building due to long hours and high operating loads. In addition, restaurants often rely exclusively on electricity for many end uses including cooking, space heating and water heating. Many