The development of the Walesi Cascade Mini-Hydro Power Plant (PLTM) in Jayawijaya Regency, Papua Province, is part of the energy transition efforts towards Net Zero Emission (NZE) 2060 in Indonesia. PLTM as a renewable energy source has the potential to reduce dependence on fossil fuels and reduce carbon emissions in the electricity sector. This study provides the economic feasibility and carbon trading potential of the Walesi Cascade PLTM development, as well as its contribution to the provision of clean energy and climate change mitigation. The economic analysis uses the Levelized Cost of Energy (LCOE) to assess the efficiency of electricity production costs. In addition, the Net Present Value (NPV) shows positive financial benefits, while the high Internal Rate of Return (IRR) reflects a profitable return on investment. Break-Even Point (BEP) is achieved in about 8.9 years, and the Benefit-Cost Ratio (BCR) is greater than 1 indicating that the project benefits are much greater than the costs. A profitable Rate of Return (ROR) also indicates the potential for long-term benefits. This study also detects opportunities for carbon trading through the Voluntary Carbon Market (VCM) scheme, supporting a sustainable clean energy transition.