Photovoltaic power generation projects can be self-built by the power users can also use contract energy management. The contract energy management enterprise shall sign the energy service agreement with the electric power user according to the state on the contract energy management and so on. The self-use PV power of the self-built PV system will not be traded. For the owner's PV power installed on the roof of other power users, the project owner and the power user will settle the contract in accordance with the contract energy management agreement. On the excess photovoltaic power, by the grid enterprise is responsible for measurement, statistics, photovoltaic system all power generation can get the national electricity quota subsidies. Grid enterprises based on the measurement of photovoltaic power data in accordance with the provisions of the national electricity subsidies in accordance with the standard cycle of the transfer of state subsidies.