1. Revenue from electricity sales: The photovoltaic power generation project will sell the generated electricity to the power grid or the electricity purchaser, and the electricity fee will be charged according to the contract. Loan repayment can be achieved partially or completely through these sales revenues. According to the contract type, the sales revenue can be calculated at a fixed price or according to the fluctuation of market price.

2. subsidy income: The government or energy agencies will provide subsidies for photovoltaic power generation projects to encourage the development of renewable energy. Loan repayment can depend on these subsidy income in part or in whole. Subsidies can include fixed subsidies, electricity subsidies or other forms of support.

3. Self-use surplus electricity sales revenue: photovoltaic power generation projects can first meet their own electricity demand and sell the surplus electricity to the power grid. You can repay the loan through the sales income of this part of self-use surplus electricity.

4. Revenue from carbon emission trading: In some areas, there is a carbon emission trading market, and photovoltaic power generation projects can earn revenue by selling carbon emission quotas, and the proceeds will be used to repay loans. Photovoltaic power generation is a technology that uses solar energy to convert light energy into electric energy.