Well it's not really that good, but researches at UNLV's Center for Energy Research Have a low/zero energy house built in the Los Vegas Area that not only doesn't have a bill for electricity used for the year, it has four months worth of credit!
Right now, Nevada Power technically owes UNLV for power it generated for the year, but while the utility acknowledges the credit, Boehm said there will be no refund check in the mail.
"But they will bring it (the power bill) down to zero, except for the $6 a month access fee" for using the utility's grid, Boehm said.
The house is a test bed for energy conservation and has everything and the kitchen sink for energy conservation where it is highly monitored and compared to a near identical but conventional house. Researchers hope to identify the most cost-effective techniques and be able to build low/zero energy home for 10% than convention structures. The experiment has finished phase one with limited occupancy and is planned to be treated more like a real home, presently the home used 58% less energy than a traditional home and more can be squeezed out used conventional conservation methods such as CFL lighting.