1. Where is the solar power system used? What is the radiation situation in the area?
2. What is the load power of the system?
3. What is the output voltage of the system, DC or AC?
4. How many hours does the system need to work every day?
5. How many days does the system need to be powered continuously in the event of rainy weather without sunlight?
6, the load situation, pure resistance, capacitive or inductive, how much starting current?
7, the number of system requirements.