**5. Conclusions**

This paper presented a quadratic buck-boost converter based on the interconnection of two basic switching cells in a noncascading structure, which is suitable for PV applications since the converter properly links a PV device with a DC power system. The proposed converter provides a wide voltage conversion ratio, a non-inverting output voltage, and a common node between input and output ports. The steady-state analysis demonstrated that the operation in a PV application differs when it is used in a voltage source application. Additionally, the voltage stress on semiconductors is more stringent in a PV application, whereas the current stress is low under this condition.

The experimental results showed an adequate operation of the converter under real conditions, and that the duty ratio controls the voltage at the terminals of the PV module, adjusting the generated power. The converter presents a high voltage conversion ratio, which allows wide input voltage variations with a clamped output voltage, desirable in a grid-connected applications through an inverter or microgrid applications.

**Author Contributions:** Conceptualization, R.L.-P. and J.A.M.-S.; methodology, R.L.-P., J.A.M.S., and M.R.; software, C.A.H.-J.; validation, R.L.-P., C.A.H.-J., and C.Á.-M.; formal analysis, R.L.-P. and C.A.H.-J.; investigation, J.A.M.-S.; data curation, R.L.-P. and C.A.H.-J.; writing—original draft preparation, R.L.-P.; writing—review and editing, R.L.-P., J.A.M.-S., M.R., and C.Á.-M.; visualization, M.R. and C.Á.-M.; supervision, R.L.-P. and J.A.M.-S.; project administration, R.L.-P. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Data are contained within the article.

**Acknowledgments:** This research was supported by CONACYT, México, under project 1982 of Cátedras CONACYT; and by PRODEP through ITLAG-CA-10.

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