Solar energy is a potential solution to meet the electricity needs of TNI AD posts and bases in border areas. However, conventional solar energy systems have limited efficiency because they can only absorb sunlight from one direction. The efficiency of solar energy systems can be improved by using a dual-axis tracking system equipped with a LDR sensor. The LDR sensor is used to detect the direction of sunlight. The change in the LDR sensor resistance due to the change in the intensity of light that hits it is then processed by a microcontroller to move the solar panel in the appropriate direction. Based on the results of testing, the dual-axis tracking system with an LDR sensor significantly increases the power generated compared to conventional solar energy systems. At the peak of performance during dynamic testing at 12:00 pm, the total power reached 2,196 W, while the static test reached a total power of 1,311 W. Therefore, the dual-axis tracking system with an LDR sensor can be a more optimal choice to improve the performance and efficiency of solar energy systems in generating electricity at TNI AD posts and bases in border areas.

Solar energy installations mathematically and visualization using the Solar Global Atlas Software simulation. The data obtained is that the highest energy occurred in the second test with the result of 365.7 Wh with the maximum power generated by solar panels of 93.28 W, battery charging energy of 321.5 Wh with a maximum battery charging power of 76.78 W. Sunhour that occurs is obtained 3.66 h with solar panel efficiency that occurs at 12.8%. The research methods used include quantitative research methods by taking data using measuring instruments using literature studies, simulations and experiments to then be processed using related formulas in the implementation of the research.