Trials conducted in a Telia site near Stockholm, Sweden, in collaboration with the Swedish Post & Telecom Authority, have showcased the potential of integrating hydrogen, fuel cells, solar cells, and batteries to extend the operating time of mobile sites during backup power needs. Traditionally, mobile sites have relied on batteries and diesel generators for secondary power sources. This project represents the first trial of combining these energy sources specifically for mobile site applications. Notably, the use of hydrogen in the setup is produced on-site through renewable energy and stored locally for utilization when required. The project, known as the Roslagen project and funded by the Swedish Post & Telecom Authority, is set to be completed by December 2025, with key industry partners including Euromekanik, Powercell, Polarium, and Soltech. Telia, aiming for net-zero greenhouse gas emissions by 2040, is leveraging this initiative to work towards sustainable and environmentally friendly operational practices. Staffan Åkesson, Head of Infrastructure at Telia Sweden, emphasizes the critical need for continuous connectivity, particularly during extended power outages due to the current geopolitical landscape. The insights gained from this project are expected to play a vital role in developing resilient, eco-friendly solutions that address present challenges while ensuring future-proof infrastructure.