This paper explores the evolving landscape of blockchain technology in the renewable energy sector, highlighting its growing trend in scholarly output, particularly in engineering, energy, and computer science. The review examines 33 research papers that discuss the integration of blockchain in various renewable energy applications, including decentralized power dispatching, certificate trading, and management in intelligent transportation systems and microgrids. The papers utilize advanced algorithms, consensus mechanisms, and smart contracts to enhance efficiency, security, and transparency. While blockchain integration can reduce costs, increase renewable source utilization, and optimize energy management, challenges such as uncertainties, privacy concerns, scalability issues, and energy consumption are identified. The paper emphasizes the need for collaborative efforts among industry stakeholders, regulators, and technology developers to overcome resistance to change and build trust in blockchain-based systems, ultimately unlocking the full potential of blockchains in renewable energy integration.This paper explores the evolving landscape of blockchain technology in the renewable energy sector, highlighting its growing trend in scholarly output, particularly in engineering, energy, and computer science. The review examines 33 research papers that discuss the integration of blockchain in various renewable energy applications, including decentralized power dispatching, certificate trading, and management in intelligent transportation systems and microgrids. The papers utilize advanced algorithms, consensus mechanisms, and smart contracts to enhance efficiency, security, and transparency. While blockchain integration can reduce costs, increase renewable source utilization, and optimize energy management, challenges such as uncertainties, privacy concerns, scalability issues, and energy consumption are identified. The paper emphasizes the need for collaborative efforts among industry stakeholders, regulators, and technology developers to overcome resistance to change and build trust in blockchain-based systems, ultimately unlocking the full potential of blockchains in renewable energy integration.