NEW DELHI: Domestic solar equipment manufacturers have criticised a Power Ministry proposal to exempt solar projects from the new basic customs duty (BCD) on solar gear imports, as long they have signed power purchase agreements (PPA) before the tax takes effect in August. The Ministry of New and Renewable Energy’s decision last week had come as a relief to solar developers since almost 80 per cent of project components are imported from China and the new import duty on such shipments would have resulted in significantly higher costs.