In Germany, key players and SMEs in the market for wind, solar and biomass energy production have demanded a need for an universal IT service platform to enable the offering of standardized high quality services for technical operation and maintenance of renewable energy power plants. To proceed towards this goal, a comprehensive data model and a technical systems integration architecture derived from a thorough requirements and business process analysis are necessary prerequisites. This paper presents and discusses the current state of research on these particular issues. Special attention is paid to the use and harmonization of international technical standards (IEC, ISO, DIN) in the area of renewable energy power plant operation.