As part of the decarbonization efforts in high-temperature industries, hydrogen is emerging as a key alternative fuel to reduce overall CO₂ emissions. In Europe, natural gas—composed of more than 90% methane—is currently the predominant fuel for glass industrial furnaces. Integrating hydrogen into this context requires the development of an industrial microgrid for on-site hydrogen production and storage. In this system, electricity is supplied by both the power grid and Renewable Energy Sources (RESs), serving the demands of a PEM electrolyser and the electrical load of the furnace. The remaining thermal demand of the furnace is met by a combination of natural gas and hydrogen. The optimization presented in this study foresees the Energy Management System (EMS) approach: for this industrial microgrid layout, the minimization of operational costs of all the components is performed on an hourly timestep, based on glass production, RES generation forecasts and gas and electricity price projections for the following 24 hours. The effectiveness of the system is proved by means of the microgrid simulation along a time period of one month. The optimization constraints account for low-emission targets and production constraints. This paper aims to investigate the flexibility and feasibility of hydrogen integration in glass industrial setting.