Green Economics

Green finance is increasingly expected to accelerate renewable-energy investment in emerging economies, yet financial volume alone does not determine whether projects become bankable. This study develops a computational bankability framework that links green-finance instruments to the weighted average cost of capital (WACC), net present value (NPV), levelized cost of electricity (LCOE), debt service coverage ratio (DSCR) and break-even project cash flow. The analytical design combines evidence synthesis with a transparent calibrated project-finance scenario rather than presenting simulated values as observed country data. For a stylized USD 100 million renewable project, the model shows that reducing financing costs from a market-rate structure to a blended/guaranteed structure lowers WACC from 11.00% to 6.40%, shifts NPV from -USD 6.52 million to +USD 23.02 million, reduces LCOE from USD 59.69/MWh to USD 48.56/MWh and increases DSCR from 1.14x to 1.43x. The project IRR is approximately 9.80%, making financing cost a decisive viability threshold. Sensitivity analysis confirms that green finance is most additional when it reduces risk premia for projects located close to the investment boundary. The paper integrates these calculations with policy credibility, institutional quality, digital infrastructure and a proposed Green Finance Effectiveness Index.