Abstract: The persistent energy deficit in Sub-Saharan Africa remains a primary barrier to socio-economic development, with Nigeria hosting the largest population globally without access to reliable electricity. In rural communities of Cross River State, the reliance on fossil fuels and inefficient stationary photovoltaic (PV) arrays limits the transition to sustainable power. This research details the exhaustive design, construction, and performance evaluation of an active dual-axis solar tracking system utilizing a PIC16F819 microcontroller and Light Dependent Resistor (LDR) sensors. By maintaining the PV panel perpendicular to the sun’s direct beam throughout the diurnal cycle, the system minimizes the cosine effect and reflection losses inherent in fixed-tilt systems. Experimental results indicate that the dual-axis tracker achieves an energy yield increase of 35.6% to 45% compared to stationary panels in the tropical climate of Calabar. The study integrates structural analysis using Finite Element Analysis (FEA) to ensure mechanical stability under peak wind loads of 162 km/h. Findings demonstrate that the integration of intelligent tracking algorithms significantly enhances the economic viability of off-grid solar deployments in rural Nigeria by maximizing specific yield and reducing the overall levelized cost of energy.

Keywords: Dual-Axis Solar Tracker; Photovoltaic Efficiency; Cross River State; PIC16F819 Microcontroller; Finite Element Analysis; Renewable Energy; Rural Electrification; Nigeria.