Of course, the biggest drawback is that we cannot store watt-hours or kilowatt-hours. To fix this, we consider Power Currency to have three components.
• Machines – steam turbines, nuclear power, PV cells, wind turbine, generator, car engine, ship engines, and farm machines.
• Fuels – oil, coal, biomass, sunlight (if harnessed), biodiesel, ethanol, gas, wood, and waste.
• Electricity – the making, delivery, and use of electricity.