I am working on "electrical energy" storage and I want to know why exactly can't we store "electricity" from a power plant. My understanding is that "electrical energy" storage actually refers to the conversion of electricity to other forms of potential energy (such as mechanical eg: dam, or chemical eg: batteries). When someone tells me that we can't store "electricity" I think they mean that we can't store electrical current (ie the flow of electrons). But, if one defines "electricity" as charges, do we have a way of storing charges (eg: capacitors) and if so could we do it to deal with outputs from a power plant ? But all that seems to imply that what we can't store is electrical power (Watts = Voltage x Current) because we can't store current. However, if we can store charges, surely we can store electrical energy according to : Energy = voltage × charge ? The bottom line being : If I say "and that jolly morning I stored electricity." Am I going to be pulled apart by the examiner?