Assuming full load is required, all compressors will run.

The panel absorbs the UV radiance from the sun, creating free heat. Subsequently heating the refrigerant gas as it passes through the heat exchanger…

At this point, we now have a distinct change in the physics of the thermal energy. Raising the internal energy within the solar collector A higher value of kinetic energy within the gas molecules Intermolecular forces weaken, and the molecules space out The molecules now move with a higher velocity All resulting in an increased volume flow…

Finally, this results in a reduced energy demand as the compressors begin to shut down as the sun takes over the load requirement Due to the increase in molecular velocity, most, if not all of the pressure produced from the additional heat is released in mass volume flow and subsequent volume conversion within the condenser and expansion valve. REMOVING THE HEAT We now have a hugely increased DeltaT. This combined with the increased kinetic energy of the gas molecules, effectively increases the surface area of the condenser.