The Fair of the Water and Renewable Energy opens 365 days a year without interruption. The reason for this is that the Internet can not be conditioned by the same parameters that the real presence in the fairs. In the Internet, seniority has to be taken into account, as well as the positioning and the universality of a permanent information service for users. Our expo contains all the elements that guarantee that permanent presence, while instantly allowing the modification of products and services offered by the companies.