International Journal of Electrical and Computer Engineering (IJECE) Vol. 8, No. 6, December 2018, pp. 4096~4103 ISSN: 2088-8708, DOI: 10.11591/ijece.v8i6.pp4096-4103  4096 Journal homepage: http://iaescore.com/journals/index.php/IJECE Response of Polycrystalline Solar Cell Outputs to Visible Spectrum and other Light Sources-a Case Study Ayman Y. Al-Rawashdeh 1 , Omar Albarbarawi 2 , Ghazi Qaryouti 3 1,2 Department of Electrical Engineering, Al-Balqa Applied University, Jordan 3 Department of Mechatronics Engineering, Al-Balqa Applied University, Jordan Article Info ABSTRACT Article history: Received Des 23, 2017 Revised Jun 2, 2018 Accepted Jun 25, 2018 In this case study, two polycrystalline solar modules were installed outdoors (irradiated by sunlight) and indoors (irradiated by artificial lights). The solar cells in both cases were installed using different color filters that allowed the passage of certain light frequencies. The amount of energy produced by each module were measured and compared to a reference module with no filter. The results indicated the variable response of polycrystalline solar cells to natural and artificial light sources, being more responsive in both cases to red band color as could be deduced from their % current outputs (72.5% sunlight radiation; 84.38% artificial light sources). Other colors, including yellow, green, orange and violet afforded acceptable outputs. The results indicated that electrical outputs of indoor solar cells decreased when colored filters were used, but red filter in general afforded the maximum outputs, for both the artificially radiated indoor and naturally radiated outdoor solar cells. The case study suggests the possible complementary advantage of using indoor mounted solar cells for the production of electricity during artificial illumination period of the day. Keyword: Artificial radiation Indoor solar cells Polycrystalline solar cells Solar radiation Visible radiations Copyright © 2018 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Ayman Y. Al-Rawashdeh, Department of Electrical Engineering, Al-Balqa Applied University, P.O. Box: 15008, Amman 11134, Jordan. Email: dr.ayman.rawashdeh@bau.edu.jo 1. INTRODUCTION Fossil fuels, including coal, petroleum and natural gas are the main sources of energy, but these resources are limited. Therefore, there is a requirement of alternative energy sources to provide us clean, low cost and renewable energy. Light in general, regardless of its source (natural or artificial) is a main promising source of renewable energy which can be converted into electrical energy by solar panels with low coast. In addition, this source of energy has minimal ecological impact causing no pollution. Moreover, the low maintenance coast and long life duration of the solar cells makes them desirable for use by ordinary people and homeowners. Solar cell panels are used to convert solar light energy into electrical one [1],[2]. The first solar panels, based on polycrystalline silicon (known also as polysilicon (p-Si)), were introduced to the market in 1981. These solar panels did not require the Czochralski process. This type of solar cells is known to have many advantages. In addition of their simple low cost manufacturing process [3], polycrystalline solar cell panels are known for their low heat tolerance [4] as compared to other types. Moreover, this type is known for their mixed PV applications indoors and outdoors with an efficiency of about 13-14% as compared to other types [5]. Due to the advantages of the polycrystalline solar cell panels, the current study was designed to investigate their response to visible spectrum and other light sources (natural and artificial). The performance