As the question was asked earlier, I did not answer it specifically.
Now the cost of solar energy is calculated based on power and it is connected in parallel to the national grid. No batteries are therefore required. In addition, the prices of domestic power plants and large power plants are also different. So let’s talk about the cost of home projects. The cost of a house project is about 10 yuan per watt. The precise price has yet to be determined based on the on-site plan. It depends on the difficulty of construction and the products used.
The 500,000 photovoltaic project you mentioned should be 500,000 watts, or 500 kilowatts, calculated at 8 yuan per watt, or 4 million.