Coal India Ltd (CIL) has invested Rs 1,209 crore in 661 MW of ground-mounted solar power projects and aims to reach 3,000 MW by 2027-28. Measures like on-site engineer deployment are ensuring project progress. Singareni Collieries and NLC India have also invested significantly in solar projects, totaling Rs 1,182.60 crore and Rs 6,723.59 crore, respectively.