Rooftop SPV systems installed on building rooftops can effectively replace DG gensets during load shedding, offering a cost-efficient and reliable power solution. The electricity generated from modern solar plants is now at par with or even lower than commercial tariffs. In grid-connected rooftop systems, the DC power produced by solar panels is converted into AC power through a power conditioning unit and supplied to the grid via 440/220V three-phase or single-phase lines, depending on system capacity. To promote solar adoption, the Government of India launched the Jawaharlal Nehru National Solar Mission (JNNSM) under the National Action Plan for Climate Change (NAPCC), aiming to scale up capacity, provide tariff subsidies, and achieve grid parity. With national targets of 100,000 MW solar capacity—40% from rooftop systems—and proactive policies like the Tamil Nadu Solar Energy Policy 2012 introducing net metering, both the Central and Tamil Nadu governments have accelerated solar growth, positioning the state as a leader in renewable energy adoption.