In response to the uncertainty, some major builders, such as Shea Homes and Pardee Homes, have begun including solar-power systems in their houses, especially in California, where favorable tax laws help make solar technology affordable. In Woodlands, Texas, outside of Houston, a fuel cell system has been successfully connected to the local utility power grid.Last September, the Houston Advanced Research Center (HARC) announced that it had connected a 5-kilowatt Plug Power--brand fuel cell to the local utility grid.
