In a decarbonized electric system, energy storage is needed. This study explores the potential of using Electric Vehicles (EVs) batteries for renewable energy storage through a Vehicle-to-Grid (V2G) system. We argue that V2G requires nuanced coordination for using EVs as mobility and storage resources facilitated by an aggregator acting as an intermediary. Emphasizing the importance of information in this coordination, we develop a theoretical framework addressing the value of information for V2G aggregators. We implement the theoretical framework in an analysis focusing on the often-overlooked aspect of the business models that might enable the information flow between an aggregator and EV owners. A multi-agent simulation in Tenerife 2040 evaluates four scenarios, each assuming that EVs are coordinated by different types of mobility apps, i.e., a decision support system that helps EV owners reserve charging stations or route navigation. The results reveal that EV owners' charging behavior information is the most important for a V2G aggregator, yet when mobility information is also considered, the value of V2G increases by a factor of six. This insight informs the development of future business models for sustainable and efficient decarbonized electric systems.