This study introduces a cutting-edge framework for renewable energy trading, optimized for smart grids and smart cities, and focused on enhancing the functionality and efficiency of energy markets. By leveraging blockchain technology and non-fungible tokens (NFTs), the framework ensures secure and transparent transactions within distributed energy networks. The deployment across multiple Ethereum Virtual Machine (EVM)-compatible platforms, such as Fantom, Polygon, and Celo, exploits their cost-effectiveness and supports broad adoption. The integration of blockchain into the energy sector, particularly within smart grids and urban energy systems, offers significant improvements in managing energy flow and consumer engagement. This research evaluates the economic impacts and business models facilitated by blockchain in the energy sector, highlighting the potential for scalable and sustainable energy solutions in smart cities. This paper is the first step to aiming for blockchain-based renewable energy trading based on detecting the most suitable platform via several analyses to prove its effectiveness.