## 5 Discussion  
The current work focused on the development of the F-channel platform under the OneNet project and the Greek demonstrator, confronting the clean energy era regarding balancing and congestion management. A quite unusual perspective of the weather forecast provider had to be considered, setting limitations regarding parts of the process and expected revenues that could be considered when developing the model. It was rather obvious that the main partnership that the WFPs (weather forecast providers) could establish would be the ones with the TSOs and the DSOs, to which the weather forecasts would be delivered to develop and to test the unified grid simulation models on the appropriate time-horizons. Since the system operators were also identified as the primary customers to which the WFPs could offer their service in the scope of the case, the revenues that were identified in the model are the ones that stem both from contracts that have already been signed between the WFPs and the stated customers and from contracts that would be signed in the future, with the usage of cutting-edge techniques and algorithms guaranteeing the improvement reputation of the weather forecast providers, which would, in turn, give them a head-start over the competition not using these methods yet. Those revenues would be used to compensate the expenses that would need to be made before the application of the innovative solution takes place, such as, for example, the costs of obtaining the necessary hardware and software tools or the expenses made for ensuring sufficient human resources for the procedures of determining and delivering the forecasts running smoothly. These expenses are made on a one-time basis, whereas the streams of income are continual, assuming that the initial investments turning into profit for the WFPs in a relatively short time is not only reasonable but, more than anything else, realistic. Implementing a project can be difficult when it comes to navigating the regulations and policies in force for new technologies. Therefore, there was an attempt to describe the activities conducted for presenting the current situation on the regulations in Greece, regardless of the time and effort that this task took, since the legal framework has no direct connection to the actions performed during the development of the platform, aside from providing the limitations that had to be considered during the initial steps of this process. Following the implementation of the target model in Greece and the coupling of the Greek IDM with the Bulgarian market, followed by the coupling with the Italian market, the implementation of the MARI [48] and PICASSO [49] platforms and the coupling with non-EU countries will provide even more significant benefits for the Greek market, but as always, several issues occurred for the European power system due to the growing market penetration of RES and the requirement for customer participation [47]. The F-platform will reduce those risks by providing a valuable tool providing flexibility via active system management of the transmission and distribution system. In Greece, the TSO and DSO will use their flexibility resources in an optimum way and coordinate their efforts to meet their regional challenges through grid services derived from prosumers, aggregators, suppliers, and producers, while also optimizing the use of network assets and big data processing tools for the predictability and observability of the network. Prosumers, aggregators, and their many forms of participation in the energy mix and flexibility provision will be included in the F-channel modules. The results of the investigated BUC scenario in Southern Greece (Peloponnese and Crete) verify to a great extent the effectiveness of the F-channel platform. The significance of the results is further highlighted from the fact that Crete will have a key role in the energy future of Europe, since will be a central node that will interconnect Europe with Cyprus and Israel.