NOVELTY - A calculating device collects data on the quantity of fuel consumed and the amount of electricity generated to compute the cost of fuel and the value of electricity generated, and to provide a debit charge of cost of fuel consumed and credit charge of the value of electricity generated, when fuel is consumed by a vehicle and electricity is generated by the vehicle.    USE - For enabling real time buying and selling of electricity generated by fuel cell powered vehicles or stationary fuel cells to consumer.    ADVANTAGE - Provides real time communication between fuel cell powered vehicle and consumer of electricity to facilitate real time buying and selling of electrical power. Provides accounting for fuel consumed and electricity generated by vehicle. Provides proper metering and billing for fuel used and energy generated. Provides timely and accurate communication between all of the participants. Provides availability of unbiased information to all of participants.    DETAILED DESCRIPTION - Vehicle connections are arranged to cooperate with the vehicle for supply of fuel to the vehicle and for transfer of electricity to and from the vehicle. The calculating device determines the current cost of fuel and price paid for generating electricity using data and information received via a network, and determines whether to make fuel cell powered vehicle available for generation of electricity based on cost of fuel and price paid for generating electricity by performing one or more calculations based on the received data and information. A controller regulates the process of consumption of fuel by the vehicle and the generation of electricity by the vehicle based on the determination result of the calculating device.    INDEPENDENT CLAIMS are also included for the following:    (a) a system of generating electrical power utilizing fuel cell power units of vehicle;    (b) a system of generating electricity from fuel cell power unit of fuel cell powered vehicle;    (c) a system of generating electrical power from vehicle including fuel cell power unit and financing cost of vehicle;    (d) a brokerage system for trading electricity; and    (e) a method for trading electricity.    DESCRIPTION OF DRAWING(S) - The figure shows the schematic diagram of real time network communication system.