Physical storage media: Compressed air, Electrochemical cells; Virtual storage media: Electricity distribution infrastructure, Liquid and solid biomass; The ‘hydrogen economy’; Calculation of electrode potentials and cell voltages; Electrolysis; Hydrogen production through reformation; Fuel feedstocks for the hydrogen economy; Polymer electrolyte membrane fuel cells; Alkaline fuel cells; Phosphoric acid fuel cells; Molten carbonate fuel cells; Solid oxide fuel cells; Rengenerative fuel cells; Fuel cell applications: Transport, Combined Heat and Power; Small scale storage systems: flywheels and springs, hydraulic and pneumatic accumulators, continuous and standby uninterruptible power supplies; Large scale storage solutions: hydro pump storage, Large scale storage solutions: compressed air energy storage, underground gas reservoirs, Sensible and Latent heat storage. Energy storage economics; Environmental implications of energy storage; Regenerative fuel cell overall efficiency; Storage and Recovery efficiency of a wind generator/rectifier-controller/battery/inverter system.