Smart grid is the name given to technologies that provide advanced capabilities to these "last mile" customers
I think you are thinking of Advanced Metering (AMI). Smart Grid is the integration of Generation, Transmission, Distribution, Retail, and Consumer technologies.
The spoliation inference is a negative evidentiary inference that a finder of fact can draw from a party's destruction of a document or thing that is relevant to an ongoing or reasonably foreseeable civil or criminal proceeding
Nothing is faster than the speed of light ... To prove this to yourself, try opening the refrigerator door before the light comes on.