**7. Conclusions**

This paper introduced a family of single-stage, buck-boost inverter topologies. Compared to the counterparts, the proposed topologies had a lower component count. The key feature of the proposed family was the application of a multi-winding tapped inductor that helped to attain a higher voltage gain required in PV applications, as microinverters. The operational principle was discussed in this paper, which was supported by simulation and experimental results. A stand-alone experimental SSBBI prototype was designed, built, and tested. Experimental results showed that the proposed topology is capable of delivering a well-shaped sinusoidal output. However, the practical voltage gain was slightly lower than theoretical prediction and the efficiency was not at a very satisfactory level due to the RCD snubber losses and the un-optimized components of the converter, which will be the future work. Overall, the proposed family can present a viable solution to single-stage microinverter applications.

**Author Contributions:** Conceptualization, A.A.; methodology, A.A. and B.Z.; software, B.Z.; validation, C.L., B.Z., and Y.H.; formal analysis, B.Z.; investigation, C.L.; resources, Y.H.; data curation, C.L.; writing—original draft preparation, B.Z.; writing—review and editing, A.A and Y.Y.; visualization, Y.Y.; supervision, Y.H.; project administration, B.Z.; funding acquisition, B.Z. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the National Natural Science Foundation of China under Grant No. 51807164 and by Shaanxi Key R&D Program under Grant No. 2018GY-073 and by Xi'an Science and Technology Association Youth Talent Support Project.

**Conflicts of Interest:** The authors declare no conflict of interest.
