The United States is turning the heat on India to change the way India is building grid-connected solar plants under the Jawaharlal Nehru National Solar Mission. The central government-run mission aims to generate 20,000 MW from sunlight by 2022, up from 46 MW today. Its guidelines require photovoltaic project developers to mandatorily source cells and modules locally. Those deploying advanced solar power systems must buy at least 30 per cent from domestic manufacturers. Since most solar project developers depend on hefty subsidies - Rs 18.44 for a unit of electricity generated for projects selected last year for a 25-year period - under the mission, the bulk of procurement is being channelled to India-based manufacturers.