Smart Electrical Sub-metering

Sub-metering separates individual zones onto their own meter. For example, the main electrical meter will measure the amount of electricity used for an entire building, while sub-meters will measure the amount of electricity used in an individual suite. The building contracts with an Energy Management or Metering Company to collect data and provide billing services on behalf of the Building Owner or Condominium Corporation.

What are the advantages of sub-metering?

There are several advantages to sub-metering. One, electrical costs are allocated to those who are actually using electricity, rather than being averaged among residents on some arbitrary formula such as on a per square foot basis. Two, sub-metering makes people accountable for the energy they use, thus encouraging conservation. Three, by still using a central or main meter, individual residents are still taking advantage of bulk rates offered by various utilities and electricity retailers, rather than the more costly residential rates. Fourth, by accurately measuring in-suite consumption, common area consumption can be isolated and energy saving measures taken, with the results more accurately verified. And finally, budgets are more accurate since a building has less financial exposure to uncontrollable energy factors, such as weather, occupancy patterns and non-energy conscientious residents.

How is sub-metering implemented?

Various sub-metering scenarios are possible, depending on the existing distribution system. Typically, a metering cabinet is installed adjacent to the existing suite distribution panels located in the electrical closets in the hallways. Devices called Current Transformers are then installed on the individual circuits going to each suite, allowing the electrical consumption to be measured. The metering cabinets are networked together and all of the data is sent to Provident, where bills can be generated.

Information for our existing Customers can be found here.