Hydrogen and renewable energy share a symbiotic relationship that is central to the global energy transition. Renewable energy sources—solar, wind, hydro—provide the clean electricity needed to produce green hydrogen through electrolysis, making renewable energy the foundation of sustainable hydrogen production. Conversely, hydrogen acts as a vital storage solution for renewable energy, addressing its inherent intermittency: excess power generated during peak renewable output is converted to hydrogen, which can be stored and later used to generate electricity or heat, creating a closed "electricity-to-hydrogen-to-electricity" loop. This integration enhances the reliability and scalability of renewable energy systems, allowing for greater penetration of renewables in the energy mix. Additionally, hydrogen enables renewable energy to extend its reach into sectors like heavy industry and long-haul transportation, which are difficult to electrify directly, further strengthening their combined role in decarbonization.