The integration of renewable energy sources is essential for addressing climate change and achieving sustainable energy systems. Traditional centralized methods for managing renewable energy data and trading present challenges in transparency, security, and efficiency. This paper explores the application of blockchain technology to address these challenges by providing a decentralized, secure, and transparent framework for renewable energy transactions. Specifically, we examine the use of smart contracts, RSA-encrypted Non-Fungible Tokens (NFTs), and the InterPlanetary File System (IPFS) within blockchain-based renewable energy trading platforms. The study includes a comparative analysis of transaction fees across Ethereum Virtual Machine (EVM)-compatible platforms to determine the most cost-efficient options for implementing these systems. Our findings suggest that the integration of these technologies can enhance the management and trading of renewable energy, ensuring secure and efficient operations.