GreenCell, Inc. has completed a new fuel cell stack design that utilizes its unique UltraTemp-C properties. The technology allows a reversal of standard flat plate SOFC designs and encapsulates the hydrogen side of the cell in an efficient bi-cell arrangement. This new capability leads to a stack design where individual cells can be replaced as well as improved safety through better control of hydrogen leakage. Coupled with low cost per kilowatt and the earlier announced new flexible seal materials a low cost of ownership can be achieved.