<![CDATA[Despite Indonesia's abundant solar irradiance averaging 4.5–5.1 kWh/m²/day, conventional photovoltaic systems remain constrained by low conversion efficiency (6–30%), attributable largely to static panel orientation and temperature-induced voltage losses that limit off-grid energy yield. This study investigates a hybrid optimization approach that integrates Fresnel lens concentration with dual-axis solar tracking to quantify the individual and synergistic contributions of optical concentration and dynamic orientation control to the electrical output of a 410 Wp off-grid PV system. The experimental methodology comprised functional verification, calibration of the Fresnel lens installation distance, and comparative performance measurement across three configurations: fixed tilt, dual-axis tracking only, and the hybrid system. Data were collected at 15-minute intervals over a seven-day period between 08:00 and 16:00 local time using a NodeMCU ESP8266-based IoT monitoring framework, with panel surface and ambient temperature logged at the same interval. The dual-axis tracker alone increased daily energy generation by 8.83% (772.7 Wh vs. 710 Wh baseline) by maintaining optimal perpendicular orientation to incoming sunlight. The hybrid configuration incorporating 15 Fresnel lenses (30 × 30 cm, 10 cm focal length) mounted at an experimentally optimized distance of 3–4 cm above the panel surface achieved 825 Wh per day, representing a total improvement of 16.19% over the fixed-tilt baseline and a 6.77% incremental gain attributable specifically to optical concentration over the tracking-only configuration. The findings confirm that the synergistic integration of Fresnel lens optical concentration and dual-axis solar tracking produces a compounded gain exceeding the contribution of either technique applied alone. The configuration suits off-grid or space-limited installations, where each module must yield as much energy as possible.]]>
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