In August 1999, after the Brasil Solar PV-powered music concert, the 4.7kWp stand-alone PV system was finally permanently installed on Ratones Island, a 150,000m2 island which hosts a Portuguese fortress constructed in the 1800’s and maintained by the University as a historic and research site. The PV system was added to an existing Diesel generator set, and the 28.8kWh (@48V) battery bank provides 2-days of storage. More than 1000 litres/month of Diesel were necessary to run the old gen set from 6PM to 10PM daily before the PV system was added, and power availability was limited to the gen set operating hours. Furthermore, gen set noise and emissions were a constant nuisance during operation times. During summer time, thousands of visitors come to the island, which is one of the tourist attractions of Florianopolis, and get acquainted with this PV installation, which is shown in Figure 7.