An electrolyte supported single chamber solid oxide fuel cell (SOFC) module consisting of two cells has been proposed. The module consists of one Sm-doped CeO2 (SDC) electrolyte substrate (0.5 mm thick with the size of 5 x 10 mm), two Ni-SDC anodes on one side, and two SDC-(La,Sr)(Co,Fe)O-3 cathodes on the other side. Two modules with different electrode areas were prepared and tested using an air-propane mixture. The electrode area had a strong influence on the performance of the module. It was shown that the two-cell module generated 1.5 V open-circuit voltage and about 17 mW maximum power at 550 degrees C. (C) 2004 The Electrochemical Society.