Mohd Athir Kamaruddin et al., International Journal of Emerging Trends in Engineering Research, 8(7), July 2020, 3319 - 3327 3319 ABSTRACT This paper presents the techno economic analyses on the cost of upgrading the abandoned photovoltaic (PV) system that installed at the building of Legal Affairs Section (LAS), Putrajaya, Malaysia. System Advisor Model (SAM) software has been used to analyze the techno economic analyses of the proposed configuration of the new building integrated photovoltaic (BIPV) system. In this study, 4 study cases have been executed that considering different units of inverter and battery installations in the existing BIPV system. From the study, it was found that by maintaining the existing PV inverter system, but by adding one unit of battery may presents best option for this LAS building, where the operational and maintenance costs can be minimized better. Hence, it is projected that the intention to reach the target of making Putrajaya as a Green City on 2025 could be realized in the near future. Key words: solar, solar inverter, grid connected building, system advisor model (SAM). 1. INTRODUCTION The renewable energy is the energy was collected from renewable resources such as wind, sunlight, rain, waves, geothermal and etc. The renewable energy implementation initiative has paved the ways to achieve sustainable development goals, especially in the realization of low carbon economies. In Malaysia, the installation of PV panels in residential, industry and commercials buildings has been imposed since 2001. This is due to the 8th Malaysia Plan (2001-2005) in which Government was introduced Malaysia Building Integrated Photovoltaic Technology Application (MBIPV) plan to encourage the application of renewable energy source in Malaysia. The goal of these initiatives is to reduce the dependence on fossil fuels and contribute towards reducing the impact of climate change [1][2]. As an alternative that has been promoted by the Ministry of Energy, Green Technology and Water (KeTTHA), PV panels have been installed at government buildings in Putrajaya [4]. One of the building was building of Section of Legal Affairs (LAS), as shown in Figure 1. The LAS building now has been built more than 10 years ago and has total gross floor area (GFA) of around 56527.82 m², net floor area (NFA) of 30595.9 m² and air conditioned area (ACA) of 41360.91 m² with capacity of 520 person. The building consists of 11 th floor including a ground floor and three basement floors for parking. The building is divided into two sections; North and South Wings. Figure 1: Building of Legal Affairs Section (LAS), Putrajaya, Malaysia. Based on the electricity bills that have been charged by Tenaga Nasional Berhad (TNB) Malaysia in 2013, this building has annual electricity consumption at around 3,878,205.607 kWh/year, which is costing of RM 1,415,545.05/year for its electricity bills. While, in year 2014, annual electricity consumption is increasing to be 4,054,963.714 kWh/year and provides bill at RM1,480,061.76/year [5]. The electrical energy consumption has been increasing due to the recruitment of staffs and procurements on electrical equipment in the building. Hence, KeTTHA decided to install PV panels at the LAS building with the aim to reduce electricity consumption and pollution The Enhancement of Solar Power System Implementation in LAS Building Mohd Athir Kamaruddin 1 , Norzanah Rosmin 2* , Siti Maherah Hussin 3 , Aede Hatib Musta’amal 4 1 Jabatan Kerja Raya Wilayah Persekutuan Putrajaya, Blok F7, Kompleks F,Pusat Pentadbiran Kerajaan Persekutuan, 62000 Putrajaya, Malaysia, athirich@gmail.com 2*,3 Centre of Electrical Energy System (CEES), POWER Department, School of Electrical, Engineering Faculty, Universiti Teknologi Malaysia, Johor, Malaysia, norzanah@utm.my, maherah@utm.my 4 School of Education, Engineering Faculty, Universiti Teknologi Malaysia, Johor, Malaysia, aede@utm.my ISSN 2347 - 3983 Volume 8. No. 7, July 2020 International Journal of Emerging Trends in Engineering Research Available Online at http://www.warse.org/IJETER/static/pdf/file/ijeter72872020.pdf https://doi.org/10.30534/ijeter/2020/72872020