The government of El Salvador recognizes the need to develop an energy system that is efficient, resilient, sustainable, and environmentally responsible. A major goal has been the diversification of the national energy matrix to maximize the use of available renewable energy sources, but there are some challenges such as the lack of policies for regulation and a structured framework for energy data registration. This work explores alternatives for the second issue through the development of a tool based on Blockchain technology that enables decentralized and transparent management of renewable energy generation and consumption data. A pilot test was conducted in a controlled environment using grid-connected photovoltaic systems on a university campus where smart contracts were used to ensure the integrity of the records as well as autonomy in the execution of conditions previously established. The findings from this controlled environment suggest the technical feasibility of the approach and provide a conceptual foundation for further exploration of blockchain applications in energy data governance in El Salvador.