This article aims to present good Operation and Maintenance Practices for solar photovoltaic plants, focusing for better efficiency and reliability. It analyzes the practices adopted by some Brazilian companies in the solar energy sector and evaluates them based on academic-scientific literature. In parallel, the study proposes measures to be taken by a company operating in the sector, for each topic covered, based on the results of interviews carried out with experts from companies in the photovoltaic solar energy sector, in order to make their processes more efficient. From the interviews carried out, it was possible to have an overview of whether or not Brazilian companies adhere to the good O&M practices discussed at this work.