How to test whether solar panels generate electricity or not

     To test whether the solar panel generates electricity, a series of tests are required. Firstly, using a solar cell tester to measure

the current and voltage of the battery is a crucial step in evaluating its performance. By determining the actual Voc, Isc, and

estimated Pmax of the panel, and comparing them with the rated value of the solar panel, we can quickly evaluate whether the

performance of the panel is close to optimal.

     In addition, photovoltaic array testing is also required, which includes insulation resistance test, insulation withstand voltage test, grounding resistance test, etc. For example, measure the open circuit voltage at both ends of the battery module string to see if it basically meets the above requirements.

     In addition, the detection of photovoltaic modules is also an important step, which requires attention to the causes of hot

spot formation, hidden crack formation, and power attenuation.

     For large outdoor solar panels, we can also conduct long-term testing in actual environments, such as comparing the actual

power generation of two solar photovoltaic panels under different conditions in areas with high wind and sand intensity. The

testing time is two weeks. In this way, we can not only determine whether solar panels can generate electricity, but also evaluate

their power generation efficiency and stability under different environments and conditions.

　　Finally, all these data will be analyzed according to the GB/T 39857-2021 standard to determine the efficiency of photovoltaic power generation. In this way, we can not only determine whether solar panels can generate electricity, but also evaluate their power generation efficiency and performance.