Today, for the most part, utilities are recording and storing data from Smart Meters at levels of resolution that are needed for billing, typically at 15 minute, half-hour or hourly intervals. Higher resolution data can provide much more valuable insight.
ONZO has developed a set of advanced detection and compression algorithms which convert 1 second energy readings within the meter into highly compressed data files, allowing high resolution data to be transmitted over existing wide area networks cost-effectively.
Source:
http://smartgrid.testing-blog.com/2013/10/16/onzo-demonstrates-smart-metering-2-0-at-european-utility-week/#more-34897