A paradigm shift is coming in how buildings interact with the utility grid. Dramatic drops in the price of PV panels has spurred the rise of the “prosumer” (Producer and Consumer): buildings that necessitate a two-way grid interaction. This, plus a renewed focus on energy efficiency, is driving the mainstream adoption of Net Zero Energy (NZE) buildings – a good thing, certainly. However, some important details remain unresolved. As more of these buildings of the future come online it is increasingly critical to make sure that the buildings are good grid citizens and are solving more problems than they create.