Abstract: In response to the increasing challenges of green electricity consumption and competition in the spot market trading for photovoltaic power generation projects in rural mountainous areas of Guizhou, this study proposes an integrated photovoltaic-energy storage-charging system solution that incorporates energy storage and charging piles to address the issue of green electricity consumption. An economic sensitivity analysis is conducted for the photovoltaic-energy storage-charging project, considering factors such as energy storage battery prices and electricity prices per kilowatt-hour. The internal rate of return is selected as the evaluation metric to analyze the impact of battery prices and electricity prices on the project's internal rate of return. This analysis is crucial for addressing the current competition in photovoltaic spot market trading and enhancing the project's economic viability. The study provides a reference for the development of photovoltaic-energy storage-charging projects tailored to local conditions in Guizhou .