The May issue of FotoVolt is online. The special coverage “Intersolar Summit shows technologies and innovations in solar photovoltaic segment”, on page 46, shows that the “Intersolar Summit Brasil Nordeste 2022” brought together more than 3 thousand visitors in Fortaleza to discuss the panorama and future of the renewable energy sector and had more than 50 suppliers of products, systems, services and solutions for the photovoltaic solar sector, many of which are highlighted in this report. See on page 34 the article “Optimization of transformers for solar energy installations”, study of optimization of step-up transformers connected to inverters that obtained the optimal rated power and ideal design of the transformer, vis-à-vis the insulation aging and the loading regime. Furthermore, on page 62, the article “What factors will define the future of lithium battery technology?” showing that aspects such as availability of raw materials in nature, material price variations and environmental and humanitarian issues will be decisive for the mastery of one or another cell technology of lithium for each application. This issue brings also the update “PV Transformers”, “PV products brazilian wholesalers” and “Cables and connectors for PV plants” buyers’ guides.