They’re trying to figure out how to run the radar and computerized AA and missile systems on the WH roof using solar panels.
I kinda believe...after actually standing at the front and back of the WH...that the roof space is not that big. They likely have highly ambitious plans on how many panels are required, and then you figure up the HVAC units...the radar (as you refer to), and the protective systems...and it’s pretty dang crowded up there. Then toss three or four guys with weapons and a spot for the President to sneak up and take a smoke, and that roof is crowded.
If you just wrote down the amount of power the building consumes....I doubt that you could do anything other than heat the water in the place.