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You are here: Home / Community / Case Studies / Verifying Error in Utility Bill

Verifying Error in Utility Bill

Overview

Finn Projects is an energy management services company in Toronto, Ontario. In December 2020, they were hired by a car dealership in Mississauga to investigate a curiously high electricity bill at their facility. The following study was conducted by Finn Projects over seven days.

 

https://powersight.com/psblog/wp-content/uploads/2021/07/20201203_094525-scaled-900x506.jpg

Study

For this study, Finn Projects used a PowerSight power analyzer and installed it on the main power distribution panel in the car dealership’s facility. The study ran for a week.

Looking at the power during the study, it was obvious that the utility meter was charging much more than the power consumed during the study period. PowerSight’s patented SureStart™ connections wizard confirmed that the connections were correct prior to starting the monitoring session. A quick check of the data after the monitoring session showed balanced power factors in each phase, further confirming that the connections were correct.

A quick check of the voltage and current profile over a seven day period looked reasonable, with current aligned closely with the demands of the service department during weekday business hours. Voltage supply was not tight, but was adequate for the requirements and nothing suspicious was noted.

As expected, the power consumption followed the current profile very closely.  All phases were fairly balanced and the total was roughly 3X each phase, as expected.  Very believable profile.

Energy consumption revealed a KWH rate substantially less than what was being billed.

A summary report was quickly created, using the PowerSight ReportWriter Wizard™. It reported both the elapsed cost during the 7 day period and the extrapolated estimated cost per month, which was dramatically less than what had been charged. The summary table (shown below) and the data graphs of the report provided a compelling story that something was amiss with the utility’s meter.

Results

The output data and report from ReportWriter convinced the utility to investigate further. After investigating, the utility discovered that they had failed to properly setup a recently installed utility meter. The decimal point was erroneously misplaced one digit to the right, meaning the car dealership had been getting charged 10x the correct amount. The utility company made the correction and now the dealership is saving $20,000 per month.

 

https://powersight.com/psblog/wp-content/uploads/2021/07/utility-screenshot-727x164.jpg

 

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