gaseous hydrogen fuel and oxygen in a non combustive electrochemical reaction to generate dc electrical power because the only by products of this reaction are heat and water a pem is friendly to the environment and may be used indoors and in other locations where it is not possible to use a conventional internal combustion engine in addition unlike a battery a pem is capable of providing electrical power for as long as fuel is supplied to the unit one pem that is suitable for the present invention is the nexa u2122 power module manufactured by ballard power systems inc of burnaby british columbia canada as with microturbine generators 10 the number of pems 250 required is dependent on the amount of power required by the destination facility hydrogen fuel is supplied to the pems 250 from a number of storage tanks 260 located in a vault 270 each of the storage tanks 260 is coupled to a valve 280 each of valves 280 is coupled to a valve 290 which is also coupled to a pipe 300 thereafter pipe 300 is coupled to a series of valves 310 and each of valves 310 is coupled to one of the pems 250 the output of the pems 250 is connected between bus line 150 and a circuit breaker 320 as stated above super capacitors 170 and the power distribution unit 160 of the facility are also connected to bus line 150 the other side of circuit breakers 320 is connected to a bus line 330 there are two switches connected to bus line 330 switch 340 is coupled to bus line 330 on one side and bus.