selection of engineering, procurement and construction (epc) contractor for design, engineering, supply, construction, erection, testing, commissioning and o and m of 2 mw (ac) solar pv power plant (2.2mwp dc) 4.5 mwh dispatchable battery energy storage system excluding all variants of lead acid batteries having 12 years plant o and m at pavagada ultra mega solar park of tumakuru district in karnataka