This technical documentation outlines the features and functionalities of the Octanise Energy Manager, a system designed for data-driven decision making aimed at reducing energy consumption, carbon emissions, and costs in commercial properties. It describes how the platform centralizes disparate utility streams, providing users with tools to monitor total consumption and identify inefficiencies. The documentation details the challenges faced in modern energy management, including fragmented data and the need for compliance with industry standards. It explains the core functionalities of the Energy Manager, including the Explore and Analyse modules, which facilitate immediate visibility and strategic evaluation of energy usage. The system's capabilities in submetering, compliance readiness, and tenant engagement are also highlighted, emphasizing the importance of transparency and data accuracy in energy management. Additionally, the documentation addresses the platform's connectivity with various utilities and its role in supporting industry accreditation processes.