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by isoprophlex 938 days ago
The solar irradiance varies by less than two parts in thousand throughout the cycles, see [1], it goes up and down by about 0.5 W/m2 around it's mean value.

On the other hand, if we hit 500 ppm CO2, that'll contribute about 3.7 W/m2. The Wikipedia page on Radiative Forcing has quantitative data, including the effect of the solar cycle...

https://en.m.wikipedia.org/wiki/Solar_cycle#/media/File%3ASo...