Photovoltaic Stand-Alone System : An autonomous or hybrid photovoltaic system not connected to a grid. The system may or may not have storage but most have require a battery
Young & Company Electric Power Products and Related Engineering Services, Glossary of Electrical Terms, http://www.youngco.com/young2.asp?ID=4&Type=3, CA., USA 2001. (Electr Sfty - Amer) {514}