Smart photovoltaic UPS system for domestic appliances

The paper deals with an innovative system achieving an auxiliary source of energy supply from photovoltaic solar system, which operates in case of blackouts by providing a set of loads determined by the continuity of service during the absence of power supply by the network. The system is designed mainly suitable for use in the field of home appliances. It also finds additional possible uses in medical and/or in industries where the continuity of service plays a fundamental role for safety. The proposed solution is based on a photovoltaic system for stand-alone coupled with a conventional UPS (uninterruptible power supply). A key role is played by an intelligent control that handles both the charge of a suitable stack of batteries, and the electrical loads connected to UPS. UPS enables loads to be supplied by assigning them an index of priority established by the operator depending on its importance or safety.