If we produced a gigawatt of energy by cleanest way possible, where do you think this gigawatt ends up? Some "energy dumpyard" somewhere outside the solar system?
The temperature is a balance between energy incoming from the sun and energy being radiated off into space. Wind and solar don't change that balance directly, although the lower reflectivity of solar panels makes a small local difference. Ultimately it's the transmissibility spectrum of the atmosphere that matters. Which is why we care about CO2 in the first place.
