A solid oxide fuel cell (SOPC) has been manufactured using a Ni-modified perovsldte and perovskite-based electrolyte and cathode. The SOFC has been investigated for operation at intermediate temperatures (800 degrees C). The electrical properties of La0.8Sr0.2Ga0.8Mg0.2O3 (LSGM) perovskite have been compared to gadolinia-doped ceria (GDC) electrolyte. This has allowed to validate the promising properties of the perovskite electrolyte compared to ceria-based ceramic membranes for operation at intermediate temperatures. The reliability of the Ni-modified La0.6Sr0.4Fe0.8Co0.2O3 perovskite-based anode for operation in combination with the LSGM electrolyte and a La0.6Sr0.4Fe0.8Co0.2O3 (LSFC) cathode has been studied. A 50 h electrochemical test for the SOFC operating under different fuel feed compositions is reported. The all-perovskite SOFC shows promising fuel-flexibility characteristics. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.