The integration of digital transformation and emerging technologies has ushered in a new era of innovation in solar energy systems (SES), addressing critical challenges in efficiency, scalability, and sustainability. Digitalization enables real-time data monitoring, predictive analytics, and advanced control mechanisms that enhance grid reliability and optimize resource allocation. This paper presents a comprehensive review of digitalization in modernizing solar energy systems, highlighting advancements such as smart grids, IoT-enabled devices, artificial intelligence (AI), blockchain technology, and digital transformation (DT). By leveraging these technologies, digitalization fosters innovation and sustainability in a rapidly evolving global energy landscape.