The cost to install a commercial solar power plant in India can vary greatly depending on a number of factors such as the size of the plant, the location, and the technology used.

Generally speaking, the cost of a commercial solar power plant in India can range from around INR 4 crore (approximately $550,000) for a 1 MW plant to INR 40 crore (approximately $5.5 million) for a 10 MW plant. These costs can vary depending on the location of the plant and the technology used. For example, a plant located in a remote area may be more expensive to install due to the cost of transporting materials and equipment to the site.

One of the biggest factors that determines the cost of a commercial solar power plant is the technology used. The use of advanced technologies such as monocrystalline or polycrystalline solar panels can increase the cost of a plant as they are more expensive than traditional technologies such as amorphous silicon or thin-film solar panels. Additionally, the use of tracking systems that follow the sun during the day can also increase the cost of a plant.

Another factor that can affect the cost of a commercial solar power plant is the location. A plant located in an area with high solar radiation levels will be more efficient and therefore more cost-effective than one located in an area with lower radiation levels. Additionally, a plant located in a remote area may be more expensive to install due to the cost of transporting materials and equipment to the site.

Finally, the cost of a commercial solar power plant in India can also be affected by the cost of financing. The Indian government offers a number of incentives and subsidies for the development of solar power plants, which can help to reduce the overall cost of a plant. Additionally, private investors and banks can also provide financing for the development of solar power plants in India.

Overall, the cost to install a commercial solar power plant in India can vary greatly depending on a number of factors such as the size of the plant, the location, and the technology used. However, with the Indian government's efforts to promote the use of solar power and the availability of financing options, the cost of installing a commercial solar power plant in India is becoming more affordable.