Household PV market space how much?

My country has a vast territory, a large population and rich rooftop resources, so there is a huge room for distributed imagination. However, due to the lack of accurate data on roof resources, it is more difficult to accurately measure the market space of domestic PV. At present, there are many ways to measure the market space of domestic PV in the market. We choose two typical methods here to indirectly estimate the space in the domestic market through the area of the residential roof and the number of households.

It can be seen, China's domestic market for distributed PV 280GW 125GW = 405GW.

Second, the household number method

According to the Sixth National Census, there are 417,722,698 accounts nationwide, of which 401,934,196 are household accounts and 15,788,502 are group accounts. Among these, it is divided into cities, towns and villages. The collective accounts for rooftop resources are related to property rights issues. The potential for installation of PV systems is relatively low. The effective number of households that can install domestic PV systems should be households, ie 402 million.