Let's not get ahead of ourselves, 100kWh is not the "low limit" of how much energy you need to get an temperature controlled home in the South for a day. This

Let's not get ahead of ourselves, 100kWh is not the "low limit" of how much energy you need to get an temperature controlled home in the South for a day. This is the figure in an environment where electricity costs nothing and there is zero pressure from home design to the actual AC unit to reduce consumption. Let's face it, this attitude isn't going to fly in the future. You could probably cut that figure by a good 10% by installing your choice of solar panels or a bunch of trees, just from less sun hitting the structure. (Cut it in half if you consider the average American in the South lives in a freakishly large house fit for a queen with entourage and is cooling all of it..)