Renewable energy monitoring is a research field and methodological approach focused on the systematic collection, analysis, and interpretation of data pertaining to the performance, output, efficiency, and environmental impact of renewable energy generation systems. It investigates operational parameters, resource availability (such as solar irradiance or wind speed), system health, and grid integration dynamics, employing techniques for real-time data acquisition, performance assessment, fault detection, and yield prediction. Its significance lies in optimizing system operation, enabling predictive maintenance, informing resource management and grid stability, and supporting the economic viability and widespread deployment of sustainable energy technologies.