While heat can affect their efficiency, it's not the primary energy source. Here's why:

* Photovoltaic Effect: Solar panels work through the photovoltaic effect. This means light energy from the sun knocks electrons loose in the panel's silicon material, creating an electrical current.

* Heat's Impact: Heat can actually decrease efficiency. As the panel gets hotter, the electrons move faster, making them less likely to be knocked free by light. This is why panels are typically designed to be cooled.

To sum up:

* Light is essential: Solar panels need light to produce electricity.

* Heat is a factor: Heat can impact efficiency negatively, but it's not the primary energy source.