This just in: The Passive House in the Woods in Hudson Wisconsin officially clocked a net-energy positive meter reading in 2011.
What does that mean?
In short, it made more energy than it consumed. While we predicted this with our energy models, we found and learned through monitoring that some equipment and appliances use more energy than assumed. On the flip side, user behavior plays a major role as well and can effectively lower energy consumption over the predicted model.
Starting the journey towards energy neutrality and beyond with a Passive House works really well, as the building is designed to provide a comfortable environment with very little energy input. The addition of carefully sized renewable sources, such as photovoltaic and solar thermal can then balance the remaining energy flow, or reverse it.
Passive House in the Woods by Corey Gaffer