Solid oxide fuel cell (SOFC) is a promising technology for decentralized power generation and cogeneration. This technology has several advantages: the high electric efficiency, which can be theoretically improved through integration in power cycles; the low emissions; and the possibility of using a large variety of gaseous fuels. The analysis of some possible improvements of a 100 kW SOFC system as well as possible applications is conducted. Both technical and economic aspects are considered. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.