A.D. Thirumurthi, advisor of the National Solar Energy Federation of India, says the consumers should be exempted from network charges for rooftop solar. Tamil Nadu has not made much progress under PM Surya Ghar scheme as the consumers face challenges with financial disincentives. Households planning to install rooftop solar systems may have to pay more as the domestic content requirement (DCR) for solar cells comes into force from June 1,.