Solar panel is the core part of solar power generation system, and it is also the most important part of solar power generation system. Its function is to convert the solar energy into electric energy, or to the storage battery storage, or to promote the work of the load. The quality and cost of solar panels will directly determine the quality and cost of the whole system.

Power calculation

The solar AC power generation system is composed of solar panels, charge controllers, inverters and batteries, while the solar DC power generation system does not include inverters. In order to make the solar power generation system provide enough power for the load, it is necessary to select the components according to the power of the appliance.

In general, solar panel power = battery power X quantity X loss. Solar panel power has theoretical and loss points, different degrees of loss, its power is also different.

The following 100W power output, 6 hours a day as an example, introduces the calculation method:

1. should first calculate the daily consumption capacity (including the loss of inverter): if the conversion efficiency of the inverter is 90%, when the output power is 100W, the actual output power should be 100W/90%=111W; if used for 5 hours per day, while the power consumption is 111W*5 hours =555Wh.

2. the calculation of solar panels: according to the daily effective sunshine time is 6 hours, and then considering the charging efficiency and the loss in the process of charging, the output power of solar panels should be 555Wh/6h/70%=130W. 70% of which is the actual use power of solar panels during charging.