bids are invited for 1. item 1 - supply, installation and testing of 3500 va, 36v pure sine wave home ups / inverter including conveyance and all other charges with the minimum features / specifications as below. dsp ( digital signal processor ) based, asic ( auto sense intelligent control ) technology, power factor controlled battery charger, lcd display -displaying state of battery voltage and charge, ac mains input voltage, display actual load connected in %, display overload, short circuit trip, battery low trip, ac mains fuse blown, etc., electrolyte level sensor indicator: for indicating battery water level low, protection: high quality protection built up in the pcb. 2 year warranty recommended make ups: hykon / apc / luminous 2. item 2- supply, installation and testing of 150 ah c10 rating battery with suitable battery tray with 4 year manufacturer warranty recomended model: exide / luminous ( q3 ) total quantity : 4