Water crisis is priority of this work and dire need to develop eco-friendly and self-sustainable unit. The current study analyses the economic and enviroeconomic of an N-identical (N-PVTCPC) collectors double slope solar desalination units (DS-DU) with a heat exchanger (HE) using water based Al2O3 nanoparticles. An analytical study in which a program was fed into MATLAB, and the analysis was monitored on an annual basis New Delhi India. The Indian Metrological Department in Pune, India provided the input data necessary for the mathematical procedure. From the solar energy for the year-round, yield and energy production will be calculated. The system’s economic, environmental, and energy-related performance has been assessed, and it will be compared to previous systems. Additionally, based on annual and life span for 15, 20, and 30 years, it is discovered that there is an 8.5% greater yield, 7.31% greater annual energy, 3.9% and 2.85% less CO2 mitigation/ton energy, and 5.17 % greater annual productivity, carbon credit respectively. Based on energy, environmental, and economic factors, it will be determined that the suggested system is superior to alternative systems.