Energy Conversion Devices (NASDAQ: ENER) is headquarted in Rochester Hills, Michigan.
United Solar Ovonic, LLC is its wholly owned subsidiary located in Auburn Hills, Michigan. Ovonics (coined from "Ovshinsky" and "electronics") is a field of electronics that uses materials able to change from an electrically nonconducting state to a semiconducting state shown by glass of special composition upon application of a certain minimum voltage. The most important example is phase change memory.
Scientist-entrepreneur Stanford Ovshinsky pioneered the field and coined the term after he founded Energy Conversion Devices, Inc. (ECD) in 1960 to further his research in amorphous semiconductors. ECD Ovonics works to create non-polluting, non-climate-changing energy sources.
is the world's largest (2008) manufacturer of conformable photovoltaic laminates, sold under the trademark 'Unisolar'. Manufacturing and global headquarters is in Auburn Hills, MI. The cells are based on a unique triple junction, and produce an efficiency of between 6 and 7 % .
Much of the production is sold to manufacturers and supplies of building envelope elements such as metal roofs (Rheinzink, Corus 'Kalzip' or polymer roof membranes (Alwitra, Solar Integrated technologies) .
In her book, Plug-in Hybrids: The Cars that Will Recharge America, published in February 2007, Sherry Boschert argues that large-format NiMH batteries are commercially viable but that Cobasys refuses to sell or license them to small companies or individuals. Boschert reveals that Cobasys accepts only very large orders for these batteries. When Boschert conducted her research, major auto makers showed little interest in NiMH batteries. Since no other companies were capable of producing large orders, Cobasys was not manufacturing any NiMH batteries for automotive purposes.
However, in December 2006, Cobasys and General Motors announced that they had signed a contract under which Cobasys provides NiMH batteries for the Saturn Aura hybrid sedan. In March 2007, GM announced that it would use Cobasys NiMH batteries in the 2008 Chevrolet Malibu hybrid as well. Cobasys remains unwilling to produce and sell NiMH batteries in smaller quantities to individuals interested in building or retrofitting their own PHEVs.