Power-to-gas is the process of converting surplus renewable energy into hydrogen gas through the PEM electrolysis technology. Hydrogen can be injected into the natural gas grid. Hence; hydrogen can displace natural gas, reducing greenhouse gas emissions and reliance on high-carbon fuels. Hydrogen manufactured from renewable energy is called green hydrogen, which can be used to store, transport, and utilize renewable energy. This technology helps to minimize variable renewable energy curtailment from sources, such as wind and solar, providing long-term storage and grid balancing services through electrolyzer.