**5. Conclusions**

This methodology proposed in this publication has been applied to a real case study, an existing PVDPS (installed in 2014) where the possibility of including wind generation is sought. Based on the performance of the existing system and on the characterization of the wind resource and wind technology, the design shows that there is a wide area in the search space of the main parameters (diesel fuel cost, average wind speed, and load consumption) where the installation of a 25 kW SWT seems recommendable.

Even though the aim of this paper is to present the methodology to permit wind technology consideration during the design process so that it can be implemented anywhere by anyone. In this particular case of application, it is expected that this study may be presented to the governing board of the utility in charge of the system so that they can evaluate the convenience of going forward with the project and to enter into the implementation of the project.

The proposed methodology used commercial software tools with a relatively high cost (mainly for the SWT field). The aim of the authors would be to achieve similar results with free tools but they are not available at the moment. One of the intentions of this paper is also to encourage researchers to keep working on such tools since it has been shown that it can be made.

**Author Contributions:** Conceptualization, L.A., N.B. and A.B.; methodology, L.A.; software, N.B. and L.A.; validation, N.B.; formal analysis, L.A. and N.B.; investigation, N.B.; resources, A.B.; data curation, N.B.; writing—original draft preparation, L.A. and N.B.; writing—review and editing, L.A., N.B. and A.B.; visualization, A.B.; supervision, L.A.; project administration, A.B. 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:** The data presented in this study might be available on request from the UTE author. The data are not publicly available due to confidentiality issues.

**Acknowledgments:** The authors would like to thank UL for their support with information and to myWindTurbine.com (a dedicated tool for the planning of small domestic turbines, which was created as a joint effort between DTU Wind Energy and EMD International A/S.) for some free licenses.

**Conflicts of Interest:** The authors declare no conflict of interest. The support from the software companies had no role in the design of the study; in the collection, analyses, or the interpretation of data; in the writing of the manuscript or in the decision to publish the results.

#### **Appendix A. Pictures from the System under Study**

In this Appendix A, some pictures from the site and from the particular components of the existing system are shown.

**Figure A1.** (**a**) Aerial view of the site, with the indication of the existing solar PV array and the gensets building; (**b**) The two battery banks and the six Sunny Island power converters.

**Figure A2.** (**a**) The inside of the gensets building with the two diesel generators; (**b**) A general view of the solar PV generator.
