The renewable energy unit of Tata Power Co Ltd (<a href="https://www.bseindia.com/stock-share-price/tata-power-coltd/tatapower/500400/" target="_blank">BOM:500400</a>) this week signed a couple of memoranda of understanding (MoU) with the government of Tamil Nadu to deploy gigawatts of power generation and expand its manufacturing capacity for photovoltaics in the state.