The integration of decentralized prosumers into current energy systems leads to continuously increasing complexity in today's popular term of the Smart Grid. Since conventional engineering methods reach their limits when dealing with the challenges in developing such systems, model-driven approaches like Domain Specific Systems Engineering (DSSE) gain significant importance. Contributing to the agile development of such a System of Systems (SoS), the application of the DSSE approach is furthermore supported by the introduction of the Smart Grid Architecture Model (SGAM) and Mosaik. However, with both concepts being individual methodologies, their interconnection is missing specifications. Therefore, this paper proposes the development of an interface between architecting and simulating a complex Smart Grid. To achieve this, the concepts of SGAM and Mosaik are analyzed in the first place in order to set up a suitable architectural model of an energy system and the corresponding simulation scenario. Subsequently, the applicability of the present approach is demonstrated by utilizing an excerpt of a real-world case study, the charging behavior of an Electric Vehicle (EV).