Some of the major UPS and inverter players

APC by Schneider Electric Aplab Best Power Equipments (I) Convergence Power Systems DB Power Electronics Delta Power Solutions India Emerson Network Power Genus Power Infrastructure Intex Technologies Luminous Power Technologies Microtek International Numeric Power Systems Pep Infotech Su-kam Power Systems Techser Power Solutions Tritronics (I) True Power International Uniline Energy Systems