Abstract: A fuel cell system includes F fuel cell stacks, where F is an integer greater than or equal to one. A coolant system includes liquid coolant in fluid communication with the F fuel cell stacks. A waste heat recovery system includes a turbine, a generator rotated by the turbine, a condenser in fluid communication with an outlet of the turbine, a pump fluidly coupled to an outlet of the condenser, and a heat exchanger in fluid communication with the coolant system, an inlet of the turbine and an outlet of the pump and configured to exchange heat between the liquid coolant and a working fluid to expand the working fluid supplied to the inlet of the turbine.