PEPCO provides real time web based metering and sub metering of Tenants in Multifamily and Commercial properties.  Metering systems includes Electric, Steam, Water, Hot Water, Chilled Water and Condensate. Reports include Hourly, Daily, Monthly and Annual usage.  Automated  Read and Bill are available including BTU usage for billing: 

Meter Integration includes the following:

INOVONICS   http://www.inovonics.com/products/multifamily-submetering/

ISTEC             http:// www.istec-corp.com/