supply, installation and commissioning of 15kva online ups with one hour backup including batteries on buyback basis supply, installation and commissioning of 15kva online ups with one hour backup including batteries on buyback basis , design, manufacture, testing atfactory, supply, installation, testing and commissioning ofstate of the art 15 kva capacity three phase input, digital signal processing controlled, igbt rectifier technology based online ups system complying alltechnicalspecifications / features / international standards as described in the tender document. , supply, installation, testing and commissioning of batteries of make-exide / quanta / southern make tubularbatteries to provide required battery backup of minimum1 hour and complying all technical specifications indicated in the technical and commercial bid. the battery bank rate shall include the cost of battery rack to house all the batteries. the minimum total ah shall be 24000 vah ( 12 v, 100 ah- 20 pcs ) . , buy back price of numeric make 15kva ups with 20nos 100 ah existing battery. , comprehensive annual maintenance charges for the above set consisting of entire 15 kva ups including batteries after 3 year warranty period. to calculate lowest bidderamc amount for first 4 years ( after warranty period ) will be calculated , first year , second year , third year , fourth year