This study presents a thorough techno-economic optimization framework for implementing renewable-dominated hybrid standalone systems for the base transceiver station (BTS) encapsulation telecom sector in Pakistan. It is noted that from the results obtained from 42 BTS sites overall, 21 BTS sites. In today's 5G era, the energy efficiency (EE) of cellular base stations is crucial for sustainable communication. Recognizing this, Mobile Network Operators are actively prioritizing EE for both network maintenance and environmental stewardship in future cellular networks. The paper aims to provide. The rapid evolution of wireless communications toward 6G networks has intensified concerns about sustainability, as ultra-dense deployments of small-cell base stations demand unprecedented levels of energy. Telecom operators need continuous, reliable energy to keep communications running 24/7. Therefore, these sites must integrate.