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All Journal Vocatech : Vocational Education and Technology Journal Jurnal Teknologi
Yuli Mauliza
Politeknik Negeri Lhokseumawe
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Mechanical Engineering

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Analisis Karakteristik Modul PV Monocrystalline dan Polycrystalline di Lingkungan Tropis Muhammad Basyir; Aidi Finawan; Arsy Febrina Dewi; Yuli Mauliza; M Fitri Anggito Sitorus
VOCATECH: Vocational Education and Technology Journal Vol 8, No 1 (2026): April
Publisher : Akademi Komunitas Negeri Aceh Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38038/vocatech.v8i1.324

Abstract

Monocrystalline and polycrystalline photovoltaic modules continue to dominate solar power system applications; however, experimental evidence based on field measurements in tropical environments remains relatively limited. This study aims to analyze and compare the performance of both PV module types through outdoor testing conducted over 30 days in Indonesia, considering the combined effects of module temperature, dust deposition, and relative humidity. The method employed was comparative field testing with real-time monitoring of key electrical parameters, namely voltage, current, and power, as well as environmental variables. The results indicate that monocrystalline modules consistently outperform polycrystalline modules, with an average power output of 102.4 W (8.6% higher) and a conversion efficiency of 17.8% (11.9% higher). Statistical analysis confirms that the performance difference is significant (p 0.0001; Cohen’s d = 1.85). Module operating temperature was identified as the dominant factor contributing to power degradation, followed by dust and humidity. Collectively, these three environmental factors resulted in an estimated power loss of 13.4% for monocrystalline modules and 16.0% for polycrystalline modules. These findings suggest that monocrystalline modules are better suited for small-scale and residential PV applications in tropical regions due to their superior performance, higher efficiency, and greater thermal resilience.   
Rancang Bangun Sistem Sensor Level Air Nirkabel Berbasis Mikrokontroler untuk Pemantauan Otomatis pada Pengelolaan Air Bersih Masjid Al Bayan Politeknik Negeri Lhokseumawe Aidi Finawan; Yuli Mauliza; Ghiyalti Novilia; Ibnu Khaldun
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9810

Abstract

Reliable water-level monitoring in public facilities is essential to support effective water management and ensure the availability of water in storage tanks. This study aims to design and evaluate a wireless water-level monitoring system based on an ESP32 microcontroller and a waterproof JSN-SR04T ultrasonic sensor, implemented at the Al Bayan Mosque, Politeknik Negeri Lhokseumawe. The proposed system adopts a master–slave architecture, in which the ESP32 Slave performs sensor data acquisition and processing, while the ESP32 Master receives and processes measurement data transmitted via Bluetooth. The system was evaluated over a measurement range of 25–200 cm through initial sensor characterization, linear regression-based calibration, water-level measurement testing, and Bluetooth communication performance testing using Packet Delivery Ratio (PDR) and packet loss as evaluation parameters. The results demonstrate that sensor calibration significantly improved measurement accuracy, reducing the Mean Absolute Error (MAE) from 1.811 cm to 0.216 cm and the Root Mean Square Error (RMSE) from 2.035 cm to 0.254 cm, corresponding to improvements of 88.07% and 87.53%, respectively. Following calibration, the sensor exhibited a relative error ranging from 0.00% to 0.60%. Water-level testing produced an MAE of 0.514%, an RMSE of 0.612%, a mean relative error of 1.465%, and a coefficient of determination (R²) of 0.99988. However, the maximum relative error of 6.88% occurred at a low water level of 12.50%. Bluetooth communication testing achieved a PDR of 100% with 0% packet loss up to a distance of 11 m, both under Line-of-Sight (LOS) conditions and with one wall as an obstruction. These results indicate that the proposed system provides accurate water-level measurement and reliable wireless data transmission, making it suitable for real-time water-tank monitoring applications.
Co-Authors Aidi Finawan Aidi Finawan Arsy Febrina Dewi Basyir, M. Ghiyalti Novilia Ibnu Khaldun M Fitri Anggito Sitorus