Billing determinant
A billing determinant is a calculation used to create rate charges. The billing determinant calculation applies a mathematical operator to interval data within a time-of-use period. For example, you can create a "summer peak" billing determinant that multiplies the per-kWh charge by the total kWh of the summer peak TOU. The billing determinant calculation can also include adjustments, such as a power factor (PF) adjustment.
Use the following procedure to create or edit a billing determinant:
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Go to Rate Modeler > Rates > Create or Edit > Billing Determinant.
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To create a billing determinant, right-click the dropdown menu near the Bill Determinant Name field and select Create.
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To edit a billing determinant, right-click the dropdown menu near the Bill Determinant Name field and select Search. (Standard IEE Using the search utility rules apply.)
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Enter a new Bill Determinant Name and Description.
The billing determinant name is a required field and must be unique.
Note: An error message appears if this duplicates an existing billing determinant.
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Select Time of Use. Select the down arrow next to the Time of Use field and select Search. Use the Query to find the appropriate Time of Use.
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Select Unit of Measure and click Search.
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In the Unit of Measure dialog, select a Commodity Type.
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Select a Unit.
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Select the row of the Unit of Measure to use for this bill determinant.
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Click OK.
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Select a How To Apply Type from the dropdown menu to dictate how the readings are aggregated to calculate the determinant.
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Maximum. Calculates a peak demand for the billing period. Select a demand unit of measure such as kW or therms per hour.
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Sum. Calculates the total consumption for the billing period. Select a usage unit of measure such as kWh or therms.
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Average. Finds the average value of all intervals.
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Minimum. Finds the minimum value of all intervals.
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MaximumDailySum. Sums all interval values within a 24-hour period (midnight to midnight) for each day within the time period (so a 30-day billing cycle would have 30 sums), then finds the maximum value of these sums.
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SumDailyMaximum. Finds the maximum of all interval values within a 24-hour period (midnight to midnight) for each day within the time period (so a 30 day billing cycle would have 30 maximums). It then adds all these daily maximums together to get the sum.
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(Optional) Select an Output Interval Length from the dropdown menu. This option is used to change the value of the primary channel, such as increasing a 15-minute interval to a 30 or a 60-minute interval. It is only used for calculating Coincident kVa billing determinants. (This includes implementation for simple COINKVA_NET(KW) and complex formula COINKVA_ABS (KWH). For more information, see Configure coincident kVa billing determinants.)
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(Optional) Select a Rolling Interval Length from the dropdown menu. This option is used to roll interval values together to a larger interval equivalent, such as rolling a 15-minute interval to a 30 or a 60-minute interval. It is only used with demand related How to Apply Type of Maximum.
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(Optional) If this billing determinant requires one or more adjustments, select Adjustments. Select one or more types and enter the values for the adjustments, and then click OK. For more information, see Bill determinant adjustments.
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Select Scripts to view the associated scripts and to change the order in which they run. For more information about scripts, see Rate modeler scripts.
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(Optional) If this billing determinant is related to a rate-based Demand Response program, select Edit Programs. Set the appropriate program listed in the window to
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Select Event handler types to dictate how the program calculates event results.
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Select Event aggregation type to dictate how the program aggregates event results over the billing period if reported in aggregate.
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Select Event reporting type to dictate how the program reports event results in the AMI Billing Export.
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Click Save (in the Action menu or on the toolbar).