International Research Journal of Innovations in Engineering and Technology - IRJIET International Open Access, Monthly, Peer Reviewed, Reputed Journal ISSN (online): 2581-3048

Impact Factor (2025): 6.9

DOI Prefix: 10.47001/IRJIET

Evaluation Study of Rooftop Solar Power System (RSPS) Utilisation Off Grid System at Ash Yard Office of Steam Power Plant (SPP) Mine Mouth (MT) Sumsel-82x660 MW

Anugrah Pratama AfinMaster of Energy, Graduate School, Universitas Diponegoro, Semarang, IndonesiaPurwantoMaster of Energy, Graduate School, Universitas Diponegoro, Semarang, IndonesiaNuki Agya UtamaMaster of Energy, Graduate School, Universitas Diponegoro, Semarang, Indonesia

Vol 9 No 1 (2025): Volume 9, Issue 1, January 2025 | Pages: 27-36

International Research Journal of Innovations in Engineering and Technology

OPEN ACCESS | Research Article | Published Date: 12-01-2025

doi Logo doi.org/10.47001/IRJIET/2025.901004

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Abstract

Indonesia is currently facing various challenges in meeting its national energy needs. About 60% of the country's electricity production depends on coal, making it crucial to reduce this dependence to achieve energy balance, enhance energy resilience, and develop environmentally friendly renewable energy sources.

In this study, the feasibility of investing in off grid solar rooftop systems is evaluated, considering technical performance, environmental impact, and economic aspects, including installation costs and potential energy savings.

This research proves that the design and installation of the off grid rooftop solar power system function well, with a performance ratio (PR) value of 83.22%, indicating that the system meets the expected standards (above 70%). In addition, the off grid rooftop solar power system is capable of producing electricity with an average annual value of 5,572 kWh. This off grid rooftop solar power system contributes to the reduction of carbon emissions at the research site by 50,531 tons of CO2e in one year, in line with the research objectives related to environmental aspects. The off grid rooftop solar power system at the Ash Yard Office is a feasible and profitable investment due to the power cable connection from the Sumsel-8 coal-fired power plant and the use of 20kV medium voltage electricity from PLN. It has a Payback Period of 19 (nineteen) years, which indicates that the investment in the rooftop solar power system at the Ash Yard Office is still worth pursuing because the Payback Period is shorter than the project's lifespan.

Keywords

Energy, Renewable, Sustainability, Investment


Citation of this Article:

Anugrah Pratama Afin, Purwanto, & Nuki Agya Utama. (2025). Evaluation Study of Rooftop Solar Power System (RSPS) Utilisation Off Grid System at Ash Yard Office of Steam Power Plant (SPP) Mine Mouth (MT) Sumsel-82x660 MW. International Research Journal of Innovations in Engineering and Technology - IRJIET, 9(1), 27-36. Article DOI https://doi.org/10.47001/IRJIET/2025.901004

Licence Copyright (c) 2026 International Research Journal of Innovations in Engineering and Technology creative common licence This work is licensed under Creative common Attribution Non Commercial 4.0 Internation Licence
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