SEPIC Coupled Inductor Using Incremental Conductance Algorithm as Maximum Power Point Tracking for Solar Panel Applications

Bambang Sujanarko; Adi Rianto; Triwahju Hardianto

doi:10.30736/jti.v11i02.1776

SEPIC Coupled Inductor Using Incremental Conductance Algorithm as Maximum Power Point Tracking for Solar Panel Applications

Authors

Bambang Sujanarko University of Jember
Adi Rianto University of Jember
Triwahju Hardianto University of Jember

DOI:

https://doi.org/10.30736/jti.v11i02.1776

Keywords:

SEPIC Converter, Coupled Inductor, Incremental Conductance Algorithm, Maximum Power Point Tracking, Solar Panels

Abstract

This paper presents the design and experimental evaluation of a photovoltaic (PV) maximum power point tracking (MPPT) system using a Single-Ended Primary-Inductor Converter (SEPIC) with a coupled inductor and the Incremental Conductance (INC) algorithm. The SEPIC converter was first tested using a DC power supply to assess its voltage-conversion characteristics, and was subsequently connected to a 50 Wp PV module and a 14.2 Ω resistive load. The converter was operated at a switching frequency of 31.4 kHz. Under a 22.5 V input, the measured output voltage was 2.2 V at a 10% duty cycle, 21.54 V at 50%, and 26 V at 55%, demonstrating step-down and step-up operation. During PV characterization, the maximum measured output power was 43.39 W at an irradiance of 983.11 W/m². The average SEPIC conversion efficiency is 89,2%. Comparative tests indicate that INC-based MPPT adapts the converter duty cycle to changing PV conditions and produces higher output power than fixed-duty-cycle operation. The efficiency improvements were 7.06% and 5.41% for unused and used MPPT in the 35% and 60% of duty cycle. These results demonstrate the potential of the coupled-inductor SEPIC converter with INC control for PV power extraction.

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Published

2026-10-29

How to Cite

Sujanarko, B., Rianto, A., & Hardianto, T. (2026). SEPIC Coupled Inductor Using Incremental Conductance Algorithm as Maximum Power Point Tracking for Solar Panel Applications. Joutica, 11(02), 257–274. https://doi.org/10.30736/jti.v11i02.1776

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Vol. 11 No. 02 (2026): SEPTEMBER

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