supply , supervision of installation and commissioning of battery charger , battery bank and dcdb with 5 years camc as per tender specification at digboi refinery , list of item ( s ) / work ( s ) as per tender documents , 110v , 50 amp , dual float cum boost battery charger , 110 v , kpm 150 ah , ni cd battery bank consisting of 90 number of cells , 110v , 300 amp dc distribution board , 110v , 20 amp , dual float cum boost battery charger , 110 v , kph 35 ah , ni cd battery bank consisting of 87 number of cells , 110v , 100 amp dc distribution board , commissioning and supervision of installation of the following:1 . 1no . of 110v 50a battery charger2 . 2 no . of 110v 20a battery charger3 . 1no . 150ah battery bank4 . 2no . 35ah battery bank5 . 1no . 300a dcdb6 . 2no . 100a dcdb , post warranty comprehensive annual maintenance contract of 3no battery chargers for first year , post warranty comprehensive annual maintenance contract of 3no battery chargers for second year , post warranty comprehensive annual maintenance contract of 3no battery chargers for third year , post warranty comprehensive annual maintenance contract of 3no battery chargers for fourth year , post warranty comprehensive annual maintenance contract of 3no battery chargers for fifth year