Technical and Economic Feasibility Analysis of Grid-Connected Photovoltaic Systems Applied to Wastewater Pumping Stations

Abstract

The increasing demand for electricity driven by population growth highlights the need to diversify the
energy matrix. In this context, the search for clean and safe energy sources has intensified. Photovoltaic
technology emerges as a promising alternative due to its ease of implementation, relatively low investment
compared to other generation sources, and attractive long-term returns. This study presents the design and technoeconomic assessment of a Grid-Connected Photovoltaic System (GCPS) intended to supply energy to a wastewater
pumping station. Considering the physical space limitations of the facility, the proposed system consists of 24
modules, resulting in a nominal capacity of 10.8 kWp and an average monthly generation of 1,875.79 kWh. Thisoutput would cover approximately 53% of the station’s electricity demand. The environmental analysis indicatesthat the system would prevent more than one ton of CO₂ emissions annually. Furthermore, an economic feasibilitystudy was conducted based on Return on Investment (ROI) and Net Present Value (NPV). Results demonstrate that the system is both environmentally and economically viable, with a payback period estimated between 4 and 5
years. Assuming a 20-year lifespan, the project would yield at least 15 years of profitability after cost recovery.