In this research, the performance of intermediate-temperature proton-conducting solid oxide fuel cell hybrid systems is investigated. It is analyzed by using Matlab/Simulink/Thermolib. There are four different fuel cell hybrid systems. The configuration of each system is slightly different, but is analyzed under the same operating conditions. Flow rates of hydrogen and air are controlled by assigning different stoichiometric ratio, which are 1.4 - 1.7 and 2 - 4 respectively.