While 3D-printed houses hold promise for sustainable construction, attention to passive design elements is crucial for achieving energy balance. This study analyzes the energy performance of a single-floored 3D-printed cement house using annual simulated data from DesignBuilder software. This study aims to assess the validity of additive manufacturing as a sustainable dwelling solution, mainly focusing on energy consumption and generation dynamics. Located in Muscat, Sultanate of Oman, this prototype explores the impact on energy performance in hot-humid climates. The data, i.e., consumption loads and PV generation, were evaluated using the Zero Energy Building (ZEB) performance metrics, i.e., site, source energy, energy cost, and CO2 emissions. The results indicate promising aspects but underscore the challenges related to energy consumption and generation balance. Despite integrating solar panels on the roof, the analysis reveals a deficit between electricity consumption and solar energy production. This disparity is attributed to passive design strategies, including glazing types and architectural structures. Factors such as the composition and thickness of walls and roofing materials significantly influence energy dynamics. Given the climate, variations in heating and cooling demands further impact energy performance, highlighting the importance of tailored design approaches for optimal efficiency. Future research will explore AI and machine learning to optimize design and materials, aiming to enhance energy performance.