Since the end of the Semana Santa, my month has been full of activities. We have been extremely happy to host Matthew Muller, former colleague of mine at NREL, for a week. Matt delivered a presentation to the CEAEMA staff and students on the current research conducted by NREL on PV reliability and on the efforts to address data quality issues in PV performance data. We also worked with him to install a first prototype of DUSST on the roof of the university (Fig. 1), side-by-s