Solar AC power generation system is composed of solar panels, charging controllers, inverters and batteries; Solar DC power generation systems do not include inverters. In order to make the solar power generation system can provide enough power for the load, it is necessary to choose the components reasonably according to the power of the electrical appliances. The following takes 100W output power and 6 hours a day as an example to introduce the calculation method:
First of all, the watt-hours consumed per day (including the loss of the inverter) should be calculated: if the conversion efficiency of the inverter is 90%, when the output power is 100W, the actual input power should be 100W/90%=111W; If used for 5 hours per day, the power consumption is 111W*5 hours =555Wh.
Calculation of solar panels: according to the daily effective sunshine time is 6 hours, and then taking into account the charging efficiency and loss during the charging process, the output power of solar panels should be 555Wh/6h/70%=130W. 70% of this is the actual power used by solar panels during the charging process.