Originally Posted by After Shock Media

The only real way this is effecient is in a near perfect set up which I have seen a few.

They rely on solar cells, windmills, passive solar, geo thermal cooling and heating of the home. Now what is done is excess solar produced electricity is then used in the hydrogen production process and the hydrogen is stored on the property. It then can be used as a gas, or it can be burnt and converted back to electricity for the house. So it sort of is a electricty bank plus it can fuel your car. This is done mostly by the entirely off the grid people and not those who sell electricty back to the grid.