Indonesia has the potential for large solar power plants. It has relatively constant solar radiation because it is close to the equator. Besides, solar energy includes renewable energy that is more environmentally friendly and easier to apply in office areas, especially Wonogiri. However, it turns out that the solar power plant projects that have been built are not yet fully functional, and some have even failed. A lack of responsibility and maintenance causes this carried out after the project is complete. For this reason, it is necessary to estimate the reliability of these components and determine the maintenance schedule before the project is carried out. So that later they have a picture and be better prepared when this project is already underway. The fault tree method's failure factors are expected to create a picture to maintain reliability and determine the prioritized components for maintainability. For the results obtained to be more appropriate, apart from seeing the quantitative analysis output, the fault tree also needs to be adjusted to the component manual or datasheet to determine the replacement of spare parts and their maintenance. So that the resulting schedule for maintenance and replacement of spare parts. Thus, the solar power plant project that has been built will be more reliable and can be appropriately utilized.

Electricity is one of the crucial infrastructures in economic development. The number of registered customers electricity increases every year based on data from the State Electricity Company (PLN) Manokwari branch office data. Electricity increase because it has become an essential part of everyday life. Therefore, in West Papua, it is necessary to fix this electricity problem where the most significant source is still from fossils. By looking at potential sources in West Papua that are more sustainable and renewable to meet public electricity demand in West Papua.In this study, LEAP software will simulate several scenarios, namely based on data from the RUPTL (Electricity Supply Business Plan) and further digging based on the potential literature in West Papua. There will be three scenarios; scenario 1 uses BAU (Business as Usual) as available in RUPTL. Scenario 2 uses BAU data and adds potential renewable energy. Scenario 3 is not using fossil energy but using renewable energy. The result is West Papua can be 100% electrified in 2025 if using scenario 2. The potential for renewable energy in West Papua is wind and sun. However, it does not rule out other sources, such as hydropower.

Global warming is one of the problems facing the world today. One solution to this problem is to utilize new and renewable energy-based power plants (EBT). The contribution of this research is to analyze the use of energy produced by PLTS FTI UII, as well as the effect of climate change on the production of PLTS FTI UII. The research steps are collecting data, calculating the value of PV mini-grid efficiency, and conducting climate change analysis on PV mini-grid production. The research data is the amount of energy production and energy consumption of PLTS FTI UII for the period March 2017 to July 2022. Efficiency calculations are carried out by calculating the ratio of production and total capacity of PLTS. Analysis of the effect of climate change on PV mini-grid energy production is to compare the GHI potential data with the total production of PV mini-grid each year. The results of the study show that the lowest level of production and efficiency of PLTS is in 2018 and the highest is in 2019. The factor that affects the low efficiency is the occurrence of many problems in 2018 so that it requires a lot of maintenance processes. This process will affect the production of PLTS so that the conversion process of solar energy decreases. Furthermore, the factor that causes the low efficiency is due to global warming which causes the climate to become uncertain and the production of carbon dioxide increases. Thus, energy production in PLTS decreases. From some of these analyzes, it can be concluded that the factors causing the decline in production and efficiency in the PLTS FTI UII system are the excessive and long maintenance process of the PLTS system, as well as climate change that occurs around the PLTS FTI UII system. The results of this study can be used for the evaluation process of the development of the PLTS FTI UII system in the future. Pemanasan global merupakan salah satu permasalahan yang dihadapi dunia saat ini. Salah satu solusi terhadap permasalahan tersebut adalah dengan memanfaatkan pembangkit listrik berbasis energi baru dan terbarukan (EBT). Kontribusi penelitian ini adalah menganalisis pemanfaatan energi yang dihasilkan oleh PLTS FTI UII, serta pengaruh perubahan iklim terhadap produksi PLTS FTI UII. Langkah penelitian yaitu pengumpulan data, perhitungan nilai efisiensi PLTS, serta melakukan analisis perubahan iklim terhadap produksi PLTS. Data penelitian adalah jumlah produksi energi serta konsumsi energi PLTS FTI UII dengan periode Maret 2017 sampai Juli 2022. Perhitungan efisiensi dilakukan dengan cara menghitung rasio produksi dan total kapasitas PLTS. Analisis pengaruh perubahan iklim terhadap produksi energi PLTS adalah membandingkan data potensi GHI dengan total produksi PLTS di setiap tahun. Hasil dari penelitian menunjukkan tingkat produksi dan efisiensi terendah PLTS adalah tahun 2018 dan tertinggi tahun 2019. Faktor yang mempengaruhi rendahnya efisiensi adalah terjadinya banyak masalah pada tahun 2018 sehingga mengharuskan banyak proses pemeliharaan. Proses tersebut akan mempengaruhi produksi PLTS sehingga proses konversi energi matahari menjadi menurun. Selanjutnya, faktor yang menyebabkan rendahnya efisiensi tersebut dikarenakan adanya pemanasan global yang mengakibatkan iklim menjadi tidak menentu dan meningkatnya produksi karbon dioksida. Sehingga, produksi energi pada PLTS menjadi menurun. Dari beberapa analisis tersebut, dapat disimpulkan bahwa faktor-faktor penyebab menurunnya produksi dan efisiensi pada sistem PLTS FTI UII adalah proses pemeliharaan sistem PLTS yang terlalu banyak dan lama, serta perubahan iklim yang terjadi di sekitar sistem PLTS FTI UII. Hasil dari penelitian ini dapat digunakan untuk proses evaluasi pembangunan sistem PLTS FTI UII di masa depan.

Planning the construction of renewable energy plants in Pacitan district addresses the increasing electricity needs every year. Pacitan Regency is located on the coast with natural conditions in most of the mountains; there is a lot of renewable energy potentials such as water,  wind and sunlight. Based on data from the central statistics agency of Pacitan district with the population increased by 0.18%/year. The energy system planning in this study allocates 70% of renewable energy generation and 30% of fossil plants by 2030.Projected availability of steam power plants with installed capacity of 2 x 315 MW, power capable of 560 MW. The distribution of renewable energy power plants is spread in the Pacitan area with hydroelectric power plants with a total target of at least 412 MW by 2025 and Pump Storage power plants with a total target of at least 1000 MW by 2025. Solar power plants have the potential of intensity radiation 4300 Wh/m2; the average air temperature is 32.5 0C and Solar Radiation 38.71%. Electricity generation waste power with a total target capacity of at least 84 MW. Wind potential with an average speed of 9 m/s. By 2030, the population of Pacitan district will reach 566,413 people, with an energy consumption of 843.85 kWh/capita; the demand required is 187,613 Mwh. By reducing the use of power plants from 100% to 30% can reduce CO^2 emissions to 125,419,390,667 Tons.