The cost of a 3 kW solar panel system for a home in India can vary depending on several factors, such as the type and brand of the panels, the location of the installation, and the complexity of the installation process. The average cost of a 3 kW solar panel system in India was between INR 1.5 lakhs to INR 3 lakhs. It is important to keep in mind that this is just an estimate and the actual cost of a 3 kW solar panel system for a home in India may be higher or lower depending on the specific circumstances of each case.