SIMULATION-BASED PERFORMANCE ASSESSMENT OF ROCK-BED SENSIBLE THERMAL ENERGY STORAGE FOR OFF-GRID SOLAR ELECTRICITY GENERATION IN NORTH-EASTERN NIGERIA. iijp. 2026;2(issue 1):903-915. Accessed April 29, 2026. https://impactinternationaljournals.com/publications/index.php/ojs/article/view/271