Problem with energy simulation results when PV panels are installed

grasshopper honeybee-legacy
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1

Hi,

I followed the tutorial (http://hydrashare.github.io/hydra/viewer?owner=chriswmackey&fork=hydra_2&id=Energy_Simulation_With_Photovoltaics&slide=0&scale=1.319507910772895&offset=24.919148043784276,57.98453229968504) (using select by type to define the surface for PV installation) to simulate the PV electricity generation.

However, under this setting, the more I installed the PV panels on the rooftop, the higher the cooling consumption is.

I also reviewed the simulation results when I define a detached surface as a PV installation area and the simulation results show that the more panels installed, the lower the energy consumption by cooling (PV panels as a shading surface, makes more sense).

May I ask what is the reason for the increment in cooling energy consumption when I install more panels on rooftop?

Thanks a lot.