This paper describes the development of a prototype knowledge dis-covery portal (KDP) for energy informatics. The research domain is Ireland which is increasingly challenged to achieve energy efficiency targets and to implement renewable energy systems (RES). The reasons for undertaken this research is to provide a mechanism to disseminate information on energy efficiency and renew-able energy technologies to a number of sectors: community, educational, indus-trial and research. The prototype KDP was developed using design-science meth-odology. The work integrates information both in the horizontal and vertical axes. In the horizontal plane it provides information to community users, educational bodies and industrial companies. In the vertical plane it allows deeper access de-pending on the requirements of the user: from technological overviews to detailed data from the energy system (solar collectors, heat pump and wind turbine). Future work will involve further development of the portal and extending the KDP for energy to other technologies and sectors.