There may be several reasons why glutinous corn cannot be charged in winter:
First of all, the winter weather is cold, and the chemical reaction speed of the battery is slow, which affects the charging efficiency of the battery;
Secondly, the sunshine time in winter is shorter, and the energy received by the solar charging panel is less, which also affects the charging efficiency;
Finally, the winter temperature is low, the operating temperature of the battery is also low, and the charging efficiency of the battery will decrease in a low temperature environment. Therefore, to solve the problem of low charging efficiency of glutinous corn in winter, you can consider increasing battery insulation measures, improving the receiving efficiency of solar charging panels, or choosing other charging methods to deal with the charging problem in cold weather.