This review presents impact of nanofluids in solar evacuated tube solar collectors (ETSCs). Recent works on this type of solar collector are summarized. The first part depicts the significance of choosing ETSCs for solar domestic hot water in addition to classification of these collectors and application of each categories. In second part, usage of nanofluids is studied in considered system and through this pervasive review, some issues such as, various kinds of nanofluids, size of nanofluids, volume fraction, and nanofluid application in every kind of ETSCs on the heat transfer augmentation have been analyzed. This state-of-the-art review shows that most of nanofluids in ETSCs are water-based with nanoparticles of TiO2, CuO, and Al2O3. Other types of nanoparticles including CeO2, WO3, Ag, CeO2, GNP, and Cu were less considered up to now. Moreover, 40, 34, and 26% of nanofluids were used with size between 1-25 nm, 25-50 nm, and 50-100 nm, respectively. Furthermore, highest thermal improvement belongs to heat pipe type solar collector with SWCNT-based nanofluids by 93.43% at m = 0.025 kg/s. Besides, nanoparticles concentrations are challenges of using nanofluid in ETSCs. This parameter has marginally affected on performance of ETSCs. So, the optimum amount of this parameter for each type of nanofluids will suggest for future works.