This paper presents a qualitative and quantitative feasibility analysis of the Power-to-Gas (PtG) technology in the future Swiss power grid which will be characterized by a significant share of intermittent renewable energy sources. The focus is placed on establishing a resolution to effectively integrate renewable energy sources (RES) into Swiss power grid through energy storage systems including pumped hydro storage (PHS) and PtG, which is commonly known to offer the advantage of a long-term storage over other storage options. The resolution will be presented through the analysis of designed scenarios that reflect the current and future energy profile of Switzerland, and will utilize the strength of a model predictive controller (MPC) with respect to the optimized dispatch of storage capacity including the existing PHS and the proposed PtG plants in addition thereto.