After checking out these items, the next thing to do is look at the structure. How large is the roof where the conductors will be placed? Can it accommodate the panels that will be required to do the job? Then how far is it from the roof to the storage tank, in feet. This, of course, assumes the location of the storage tank has already been selected. Remember, there will be pipes going from the solar conductors on the roof to the tank and back again to the roof.