Solar power generation monitoring method and solar power generation monitoring system

A system for monitoring solar power generation, comprising:

• an information collection device configured to collect information for calculating a power generation loss;
• a computing device connected to the information collection device and configured to calculate the power generation loss of a solar cell array based on the information for the power generation loss transmitted from the information collection device;
• a display and monitoring device connected to the computing device and configured to display and monitor the power generation loss calculated by the computing device;
• and
• an alarm and advice device connected to the display and monitoring device,
• wherein the solar cell array is provided in a plurality, each solar cell array comprises a plurality of solar cell array units each comprising a plurality of solar cell modules positioned in series or in parallel, a DC power output from the solar cell array is converted by an inverter to an AC power, the computing device is configured to calculate a cable loss based on difference in numerical values between DC power meters of the solar cell array or based on wire resistance and a numerical value of a DC power meter, calculate a maximum power point tracking loss based on difference in numerical values between the DC power meter and a voltage-current measuring device in a solar power generation system or based on a numerical value of an actinometer and a numerical value of the DC power meter in the solar power generation system, calculate an inverter loss based on difference in numerical values between the DC power meter and an AC power meter, calculate a system output coefficient, calculate a module temperature loss based on a rated output power of the solar cell array, a temperature coefficient of the solar cell array, a numerical value of the voltage-current measuring device, a numerical value of the actinometer, a numerical value of a thermometer and a numerical value of the AC power meter, and calculate a module loss based on the cable loss, the maximum power point tracking loss, the inverter loss, the system output coefficient and the module temperature loss, and the alarm and advice device is configured to issue at least one of alarm and advice based on a monitoring result obtained from the displaying of the cable loss, the maximum power point tracking loss, the inverter loss, the module temperature loss and the module loss.