The May issue of FotoVolt is online. The article “The brand new Brazilian Atlas of Solar Energy”, on page 10, reports on the processes for development of model and preparation of the second edition of the Atlas, scheduled for June, which will have an expanded and higher resolution database, also containing analyzes on the variability of the solar resource and scenarios for the use of technologies photovoltaic and thermal. See page 20 the preview of “Intersolar South America 2017” (São Paulo, August 22th to 24th), edition of the largest industrial fair and congress on photovoltaic and thermosolar energy in the world, which will discuss the current panorama, perspectives and evolution of this sector. Read on page 34 the article “Case study: FV system project for residential condominium”, presenting the project elaborated for a condominium in Curitiba, describing the steps of measurement of the usable area, available irradiation, sizing, specification, costing and calculation of financial return. This issue brings also the update “Energy storage systems” and “String boxes - protection and insulation boards for PV systems” buyers’ guides.