Abstract: Consistent electricity supply remains a major challenge in many tertiary institutions located in off grid and semi grid regions of Nigeria. Although solar photovoltaic systems are increasingly adopted as a clean energy solution, their intermittent nature limits their ability to provide uninterrupted power without adequate energy storage (Divya & Østergaard, 2009; Dunn et al., 2011). This study presents the design, construction, and performance evaluation of a movable modular energy storage system developed for the Federal College of Education (FCE), Gidan Madi, Sokoto State. The proposed system integrates electrochemical energy storage with a pure sine wave inverter housed in a compact, mobile enclosure, allowing flexible deployment across different campus locations. The system was designed to complement existing solar infrastructure and to provide temporary backup power for newly constructed facilities awaiting permanent electrification. Construction involved mechanical frame fabrication, electrical wiring, protection device integration, and thermal management provisions. Performance testing revealed a stable alternating current output of 220 V at 10 A, confirming the system’s suitability for powering typical academic and administrative loads. The results demonstrate that the developed system offers a practical, scalable, and cost-effective approach to improving energy reliability in educational institutions. The study contributes to sustainable energy solutions for off grid environments and provides a replicable model for similar institutions in developing regions.

Keywords: Modular energy storage, solar energy, inverter system, renewable energy, off-grid power, educational institutions.

Downloads: | DOI: 10.17148/IJIREEICE.2026.14201