supply and installation of batteries, buyback of ups and batteries in serc, iisc this is a tender for the supply and installation of batteries for 2x120 kva ups system and buyback offers for a ups system and batteries in supercomputer education and research centre (serc), indian institute of science, bangalore. , cat (a) -items to be supplied and installation , batteries for existing 2x120 kva ups system - 12v, 150 ah, smf vrla batteries, 40 cells in each battery bank, for a total of 80 cells as described in section 3.1 of the tender. , five year comprehensive warranty , cat (b) - buy back items , buy-back (ie minus) buybacks of300 kva ups , buy-back (ie minus) buyback of 2v, 1250 ah smf vrla batteries , buy-back (ie minus) buyback of 12v, 150 ah smf vrla batteries