Operation and maintenance costs: Solar power systems require regular maintenance and upkeep to ensure their normal operation. Operation and maintenance costs include maintenance personnel's wages, maintenance equipment purchase costs, repair costs, etc. In addition, due to the intermittent nature of solar power generation, high-cost storage equipment is required for storage and dispatching, which also increases operation and maintenance costs.

While the initial investment cost of a hydrology solar power system may be high, its long-term operating costs are relatively low. Solar energy is a green, renewable energy source. Using solar power supply system can reduce dependence on traditional energy sources and reduce energy costs. In addition, solar power supply systems can also reduce environmental pollution and meet the requirements of sustainable development. When considering the cost of a hydrology and water conservancy solar power supply system, its initial investment cost and long-term operating cost need to be comprehensively considered, and its economic and environmental benefits need to be weighed. With the continuous advancement of technology and the reduction of costs, it is believed that the application of solar power supply systems in the field of hydrology and water conservancy will become more and more widespread.