Ondachi, P.A. 2024. Optimisation of an On-grid Hybrid Energy System: A Case Study of the Main Campus of the University of Abuja, Nigeria. ABUAD Journal of Engineering Research and Development (AJERD). 7, 1 (Jun. 2024), 295–308. DOI:https://doi.org/10.53982/ajerd.2024.0701.30-j.