Specialty Concepts is a global manufacturer of electronics for photovoltaic systems. Its products include photovoltaic controls, solar controllers and its patented ASC charge and load controllers. The ASC 12/16 is a series type regulator for solar battery charging. The ASC is a negative ground switching shunt regulator, housed in an anodized aluminum chassis and encapsulated in a hard epoxy resin. The company s ASC photovoltaic battery charge controller is ideal for 1-4 panel systems. It is solid state and completely sealed against harsh environments. Specialty Concepts was established in 1981 and is located in Chatsworth, Calif.