India, Aug. 19 -- Reliance Infrastructure has received Letter of Award (LOA) from NHPC for 390 MW inter state transmission system (ISTS) - connected solar power project coupled with Battery Energy Storage System (BESS).Once commissioned, the project will add 700 MWp of solar DC capacity, and 780 MWhr of BESS capacity to Reliance Group's portfolio, consolidating its leadership in new energy solutions.The winning tariff was discovered at Rs 3.13/kWh, positioning the project among the most competitively priced offerings in India's energy transition landscape.The project is part of a broader tender floated by NHPC, which saw participation from 15 entities, with 14 qualifying for the e-reverse auction. The tender was oversubscribed by nearly 4 t...