The aim of this study is to develop a market analysis for the energy efficiency residential sector and to propose a business plan for the company Enerbyte, Smart Energy Solutions to move from a B2B to a B2C business model. The work is divided in four main blocks: First, an introduction to the energy retail market with some important influencers such as smart meters and prosumers is presented. Second, an overview of the company is provided in order to present the actual market of Enerbyte and the product delivered. Then, a competitor analysis has been developed with the objective to analyse the products offered by the companies serving residential consumers with energy efficiency solutions. Additionally, a comparison between B2B and B2C companies is presented in order to identify the main differences between them. Finally, a business plan has been proposed based on a B2C model. A strategic decision has been made to focus the business model on a niche market composed by prosumers and the most appropriate geographical markets have been identified considering several parameters such as number of prosumers and smart meters data access.