Fuel cells are very useful as power sources in remote locations, such as spacecraft, remote weather stations, large parks, rural locations, and in certain military applications.
The modern soldier carries far more electronics than his predecessors and the resulting increase in power needs has led to heavier and heavier rucksacks as the soldiers are forced to carry extra batteries. Fuel cells could replace batteries in certain applications although cost and performance remain key concerns. Other military applications include transport, cogeneration for buildings, submarines, aircraft)
Diesel generators are the solution of choice for many stand-alone applications (telecom relay stations, construction sites, USP, etc.). A low cost fuel cell stack could dislodge the inefficient diesel generator. Again, cost and durability are key issues.
Nearly 20% of the U.S. truck fleet fuel consumption is used when trucks are idled but electric power must be maintained. For example, refrigerated trucks must keep their engine running lest the refrigeration unit lose power and the perishables are lost. A fuel cell stack attached to a natural gas or propane tank could meet this demand and reduce idling losses. However, cost and durability have been a key barrier here.
As certain types of fuel cells generate both heat and electricity using natural gas as a fuel, it is potentially possible to provide heat and power to the home using a fuel cell stack. Cost, durability, and performance have been key barriers.
A lightweight and easily rechargeable fuel cell could allow a laptop to run for days rather than hours without seeing an electrical outlet. However, cost and competition from alternative solutions remain key concerns.
