The current energy crisis is making everyone crazed about finding ways to save on energy. The Historic Act encourages the use of Solar Panels and Skylights and Wind Generators provided that there is no change in the appearance of the structure. The only way to do that is to put the solar panels on the back of the house where no one can see them. IF the sun cannot be captured by the back of the roof, there are new architectural roof shingles that have solar panels interspersed throughout the roof so they aren't really visible. Skylights make the wrong appearance and also belong on the back.
Our forefathers were frugal and very eager to conserve energy. However, they never allowed function to diminish form. Saving on energy and protecting the beauty of Cape architecture are valuable goals that help everyone.