Interesting! I see the current load on the panel will not change the light absorption properties of the silicon crystal so no visible change. The current carries away some power which tends to reduce the temperature but the remission of light (in the infrared range) from energized electrons that previously didn't make it out of the panel is reduced, reducing that cooling effect. These may well cancel each other out. If there is a reduction in temperature the flow of heat via convection and conduction will decrease and the temperature will quickly stabilize.
It takes a lot of electric power to equal what we think of as a small amount of heat flow so I doubt if there will be a noticeable temperature change.
