Abstract: A monitoring method for a solar power generation system is provided. The solar power generation system includes a solar panel and a maximum power point tracking (MPPT) device. The monitoring method includes receiving a current output power of the solar power generation system from the MPPT device; and sensing a current value of an environment parameter through a sensor. The monitoring method further includes comparing an ideal output power corresponding to the current value of the environment parameter and the current output power according to a conversion table; and in response to a ratio of current output power to ideal output power being less than a first percentage, issuing a first warning.

Abstract: A unmanned aerial vehicle charging system for charging an unmanned aerial vehicle is provided. The unmanned aerial vehicle charging system includes a platform, a wireless charging coil assembly, a first electromagnet, a second electromagnet, and a third electromagnet. The wireless charging coil assembly is disposed on the platform. A first virtual line and a second virtual line pass through the wireless charging coil assembly, wherein the first virtual line is substantially perpendicular to the second virtual line. The first, second, and third electromagnets are disposed on the platform. The first electromagnet and the second electromagnet are located on opposite sides of the first virtual line. The second electromagnet and the third electromagnet are located on opposite sides of the second virtual line.