Techno-economic of Residential Application for Grid-Connected Photovoltaic-Battery under Net Energy Metering

Abstract

Nowadays, the demand for electrical energy is increasing due to the widespread use of electrical equipment such as air conditioners, refrigerators, televisions, computers etc. Grid-connected photovoltaic (PV) systems allow significant penetration of PV generated electricity into the national utility grid particularly under Net Energy Metering (NEM) incentive. However, it can cause grid instability and energy curtailment. The self-consumption (SELCO) program offers a solution by reducing the amount of PV energy fed into the grid through direct consumption of generated electricity and storage of excess energy in batteries. This paper presents a techno-economic analysis of a PV-battery system for grid-connected residential applications using PVsyst software. The self-consumption ratio (SCR), self-sufficient ratio (SSR), net present value (NPV), return on investment (ROI) and simple payback period are analyzed. The results show that the average monthly SCR and SSR are 85.8% and 68.8% respectively. The ROI is 17.8% with a payback period of 10.2 years, indicating that the investment in this project is financially viable.