Abstract: The present disclosure includes a fuel cell system comprising a fuel cell stack with multiple fuel cells and a control system in communication with the stack. The control system features a cell voltage monitoring system that measures the voltage of each fuel cell in the stack. If the measured voltage of a fuel cell drops below a predetermined threshold, the monitoring system triggers a shutdown procedure. The voltage bleed down time measured during the shutdown procedure, in comparison to a predetermined and calibrated threshold, can be used to indicate a membrane failure that requires a replacement of fuel cell stack.

Abstract: A modular design for a storage tank system can be deployed across multiple vehicle platforms. Certain embodiments can include a rack. The rack can be configured to hold a storage tank. The rack can include a frame assembly. The frame assembly can include a base, an upright support member, and a strap connected to the frame assembly, where the strap can be configured to secure the storage tank on the frame assembly. In some embodiments, the base includes a Y-axis support member and an X-axis support member. The storage tank can sit across the Y-axis support member in a secured configuration. The rack can be configured to removably mount to a platform of a vehicle.