Visible light - which is converted by solar panels into electricity - isn't heat. Visible light is photons which are energy. Visible light produces heat when it strikes the surface of an object by exciting the molecules of the object. Solar panels capture visible light and converts it into electricity before the photon produces heat. Conservation of energy. The photon can't become electricity and heat the surface of the planet.
Visible light is made up of photons, the fundamental particles of light. While visible light can be absorbed and converted into heat, it's not heat itself, but rather a form of energy.
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Solar panels convert visible light into electricity through a process called photovoltaics. The
photovoltaic effect involves the absorption of photons (light particles) by the solar panel's material, which then releases electrons, creating an electric current. While some solar panels also absorb some UV and infrared light, visible light is the primary source of energy conversion in most solar panels.