There is absolutely no direct link between solar flares and Global Warming.

None !

This is Sol, our sun, in relation to Earth. The amount of solar radiation that comes off the Sun is enormous, but, the amount that passes Earth is miniscule. When there is solar activity there is a large amount of energy released, but, it is not DIRECTED at Earth. Only a small amount on any given day of Sol's energy reaches Earth. Solar flares and sunspots might interrupt cell phone transmissions because of it's wavelength but that is only for the instant it is occuring. That is not cumulative and in no way has sufficient magnitude to affect Earth's warmth.

The amount of 'incoming' radiation is irrelivant to the amount of heat. We already know the amount of heat of Earth is dictated by wavelength that produces heat called infrared. We know that the amount of infrared retained by Earth is directly related to the Greenhouse Gases and their density/moles. No matter how much direct sunlight reaches Earth the ONLY heat that is retained is due to the gaseous mixture of the troposphere.

It is a completely false premise and should never be taken seriously as a reason for Global Warming.