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Erlina
Institut Teknologi PLN
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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Design, Construction, and Performance Analysis of a Portable Solar Panel for Efficient Smartphone Charging Tri Joko; Erlina; Doni Pratama
ZETROEM Vol 8 No 2 (2026): ZETROEM
Publisher : Prodi Teknik Elektro Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/ztr.v8i2.8137

Abstract

This study aims to design, construct, and analyze the performance and efficiency of a portable solar panel system specifically developed for smartphone battery charging as an environmentally friendly alternative energy solution. With the increasing reliance on portable electronic devices and the urgent need to reduce fossil fuel dependency, a highly mobile and efficient charging system is required for outdoor or off-grid situations. The research utilizes a quantitative experimental method, employing a 20 Watt-Peak monocrystalline solar panel, a 12V 7Ah storage battery, a Solar Charge Controller (SCC) to regulate energy flow safely, and a buck converter to adjust the output voltage for smartphones. The portable system was integrated into a compact suitcase design for high mobility. Performance testing was conducted over seven consecutive days from 08:00 to 16:00, measuring voltage, current, power output, charging time, and overall system efficiency. The results indicate that the solar panel's output power is highly dependent on sunlight intensity, reaching its maximum peak of up to 15.40 W at midday while maintaining a relatively stable voltage range. The system demonstrated the capability to gradually and safely charge a smartphone battery up to 80% capacity. The highest overall system charging efficiency recorded during the testing period was 55.5%. In conclusion, the designed 20 WP portable solar panel system exhibits stable performance and adequate efficiency, making it a highly practical, reliable, and sustainable off-grid power source for charging portable electronic devices.
Study of Smart Microgrid Technology on a Laboratory Scale Grid System Heri Suyanto; Erlina
ZETROEM Vol 8 No 2 (2026): ZETROEM
Publisher : Prodi Teknik Elektro Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/ztr.v8i2.8309

Abstract

The utilization of renewable energy sources to meet electricity demand has become increasingly important. However, comparative studies on the technical and economic performance of on-grid and off-grid smart microgrid systems remain limited. This study aims to evaluate the configuration and performance of a smart microgrid system by comparing different operating configurations using HOMER software. The system was modeled by defining the electrical load, simulating the proposed configurations, and evaluating their technical and economic performance based on power output, Net Present Cost (NPC), and Cost of Energy (COE). The results show that the proposed grid-connected smart microgrid provides the best overall performance, with approximately 80% of the electrical energy demand supplied by the photovoltaic (PV) system and the remaining 20% provided by the PLN grid, demonstrating effective utilization of renewable energy resources. Economically, the proposed system achieves an NPC of Rp. 828,391,700 and a COE of Rp. 419.28, which are lower than those of the off-grid configuration (NPC of Rp. 2,664,679,000 and COE of Rp. 3,151.07) and the grid-only configuration (NPC of Rp. 906,104,800 and COE of Rp. 1,071.00). These findings indicate that integrating photovoltaic generation with the utility grid offers a more cost-effective and reliable solution while significantly increasing the contribution of renewable energy to the electricity supply. Therefore, the proposed smart microgrid configuration can serve as a practical reference for the design and economic evaluation of future grid-connected renewable energy systems.
Co-Authors Doni Pratama Suyanto, Heri Tri Joko