Abstract In this paper, theoretical analysis of double slope solar still (DS) incorporated with N identical evacuated tubular collectors (N-ETC-DS) has been done on the basis of productivity, exergo-economic and enviro-economic parameters. The proposed system has been analyzed taking 4 categories of meteorological situations for each month of year for climatic condition of New Delhi. A comparison of proposed N-ETC-DS (case (i)) has been made on the basis of outcomes with outcomes of previously reported systems namely N identical photovoltaic thermal (PVT) flat plate collectors (FPCs) incorporated with DS (case (ii), N identical PVT compound parabolic concentrator collectors (CPCs) incorporated with DS (case (iii)) and conventional DS (case (iv)). It has been concluded that the proposed system gives best performance on the basis of values of annual productivity and production cost of potable water followed by case (ii) and case (iii). The cost of producing potable water is lower by 74.45%, 136.17% and 82.98% and the value of annual productivity is higher by 50.97%, 55.24% and 37.82% for case (i) than case (ii), case (iii) and case (iv) respectively.