The main objective of project e-GOTHAM is to implement a new aggregated energy demand model (based on the microgrid concept) to effectively integrate renewable energies sources, increase management efficiency, reduce carbon emissions, raise energy consumption awareness and stimulate the development of a leading-edge market for energy-efficient technologies. In designing an open architecture and developing a middleware that enables the communications needed to optimise management and the results, the challenge is to assemble a system that can ensure enough scalability, security, reliability, real time measurements and interoperability. e-GOTHAM seeks to meet the needs of the respective market partners and to influence consumers and the regulatory authorities. Creating an ecosystem is intended to attract relevant stakeholders willing to develop the project results into new products and services and to support a new aggregated energy demand model even beyond the project lifetime.