NEW DELHI: India has achieved self-sufficiency in solar module manufacturing. But the feat has rendered domestic producers of polysilicon, wafers and ingots - the building blocks for modules - vulnerable to dumping by China-owned companies.The manufacturers of these inputs, who make up the solar industry's upstream segment, are now seeking safeguard duty (SGD) against Chinese supplies and policy interventions such as making locally-made supplies mandatory, similar to the ones given to module manufacturing.Industry body ISMA recently told renewable ministry officials that the dumping will impact the viability...