In October the Dow Chemical Company introduced its PowerHouse™ Solar Shingle in Colorado, with sales in twelve other states to follow in 2012. D.R. Horton Inc., the largest homebuilder in the U.S. with operations in 26 states, is committing to install the building integrated photovoltaic (BIPV) product on 50 new homes in Spring Mesa, Colorado. Each roof will provide 3 KW of nameplate electricity. The three-part solar roofing system package includes an array of shingles, an energy monitoring system, and an inverter to convert direct current to alternating current. The PowerHouse™ solar shingle is made in Midland.