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Technologies 2017, 5(2), 18; doi:10.3390/technologies5020018

A Transportable Photovoltaic Power Generation System Utilizing a SiC Inverter and Spherical Si Solar Cells

1
Department of Materials Science, The University of Shiga Prefecture, 2500 Hassaka, Hikone, Shiga 522-8533, Japan
2
Collaborative Research Center, The University of Shiga Prefecture, 2500 Hassaka, Hikone, Shiga 522-8533, Japan
3
ArumoTech Corporation, 572 Sanboh-Nishinotohincho, Nakagyou-ku, Kyoto 604-8277, Japan
4
Clean Venture 21 Co., 38 Ishihara Douno-Ushirocho, Kissyouin, Minami-ku, Kyoto 601-8355, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Manoj Gupta
Received: 10 March 2017 / Revised: 19 April 2017 / Accepted: 19 April 2017 / Published: 21 April 2017
(This article belongs to the Section Energy and Environmental Technologies)
Download PDF [673 KB, uploaded 21 April 2017]

Abstract

This paper reports a 100-W class transportable photovoltaic (PV) power generation system built with SiC power devices. Conventionally, studies on SiC power converters have mostly focused on multi-kW applications. In this paper, we have verified the feasibility of the SiC power devices for sub-kW PV power generation systems. The developed PV power generation system consisted of a spherical Si solar cell module, a 150-W SiC PV-inverter unit with maximum power point tracking (MPPT) function, and a 12-V Li-ion battery. The total weight of the system was just 4.3 kg. Conversion efficiencies of the MPPT charge controller and the direct current-alternating current converter reached 98.0% and 88.4%, respectively. The developed system exhibited stable output power characteristics, even when the weather conditions were fluctuated. These compactness, high efficiencies, and excellent stability clearly indicated the feasibility of SiC power devices even for sub-kW class PV power generation systems. This kind of system would be available for the applications where compactness and transportability are of tremendous importance.
Keywords: silicon carbide; spherical Si solar cell; photovoltaic inverter; maximum power point tracking; DC-AC converter; lithium-ion battery silicon carbide; spherical Si solar cell; photovoltaic inverter; maximum power point tracking; DC-AC converter; lithium-ion battery
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ando, Y.; Oku, T.; Yasuda, M.; Ushijima, K.; Murozono, M. A Transportable Photovoltaic Power Generation System Utilizing a SiC Inverter and Spherical Si Solar Cells. Technologies 2017, 5, 18.

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