Please check the following steps to see if it helps:

• Please note that the solar panel will only function properly in direct sunlight and not through a window.

• Keep in mind that the output amperage of the solar panel is not consistent throughout the day and varies depending on the season.

• Please check the temperature as it can affect the performance of the solar panel. When the temperature is around 20℃, the intensity of sunlight may not be strong enough.

• Try using the solar panel with a different phone and cable to see if that helps.

If you have any questions, please contact us for further assistance.