The government commits to reduce emissions in the energy sector by using new and renewable energy by targeting the development of geothermal power plants (GPP) of 7,241.5 MW in 2025. Approximately 58% of geothermal potential is in forest areas with a carbon absorption function. This study will calculate the potential loss of carbon stock and the economic valuation of the carbon sequestration function in forest areas. The location of study is Mount Ciremai National Park (MCNP). The study was conducted on 4022.37 hectares which will be used as the location of the initial study and geothermal exploration area. The potential area of GPP location is divided into: avoid area, minimize area, restore area, and utilization area, considering the land slope level and zoning. The potential carbon stock lost due to the entry of the GPP project in MCNP is 168,311.99 tons of CO2, or 17.95% of the total potential carbon stock in the study area. The economic valuation of carbon stocks using the economic value of carbon is Rp. 5,049,359,810.00. This value is the cost of externalities as compensation for carbon loss from land conversion activity. It should include as input to the economic analysis of geothermal project development.@en

Smart cities offer an opportunity to households to use low-carbon electricity from rooftop solar photovoltaic (PV). The capacity of rooftop solar PV has been growing rapidly in a developed country, especially Australia that has a capacity of 8 GWp in 2018. Developing countries also have a similar aim. For an instance, Indonesia has encouraged the use of rooftop PV through the regulation of the Minister of Energy and Mineral Resources Number 49 of 2018 concerning the use of rooftop PV systems by consumers of the State-owned Electricity Company. To boost rooftop solar PV investments, Indonesia needs to adopt successful programs in developed countries, such as an application that can provide information on the benefits and costs of rooftop solar PV shortly and comprehensively. Our study aims to create an application, called the electronic survey, monitoring, and reporting of PV (e-SMART PV), application. Compared to other similar applications, e-SMART PV is able to inform the investment costs and potential for electricity production by considering the regulations in Indonesia that are different from developed countries. Moreover, e-SMART also has better economic analysis compared to existing similar applications.@en

In 2020, Indonesia Government through the Ministerial Regulation of Energy and Mineral Resources No. 12 Year 2015 obligates the use of 30% biodiesel mixed diesel fuel (B30) for various sectors including the power generation sector. The obligation potentially affects the performance of oil-fired power plants (PLTD) and gas engine power plants (PLTMG) that are common power plant technologies used by the State-owned Electricity Company (PLN) in remote and disadvantaged areas. The objective of this study is to estimate effects of B30 usage on performance and emissions of PLTD and PLTMG. We compare performance and emission data of 3 (three) power plants before and after using B30. The results show that the uses of B30 increases spesific fuel consumption (SFC) by 0.009 L/kWh in PLTD and by 0.0071 L/kWh in PLTMG. The uses of B30 will reduce emissions of SO2, CO, and particulate matter, except NOx emission. @en