How to Set Up an SQ Rule to Add Together Two Service Quantities

Let's assume the rate contains charges based on the TOTAL amount of s (a variable representing the price per kWh with no TOU or SQI). However, some customers who use this rate have time-of-use meters that measure kWh in respect of peak and off-peak hours (i.e., the meters have two registers where one measures kWh peak and the other measures kWh off-peak). This means that you will need an SQ Rule to add together the two measured service quantities to derive total kWh.

The following table shows the array that will be supplied to the rate assuming the customer's meter measures kWh peak usage and kWh off peak usage:


Unit Of Measure	Time Of Use	SQ Identifier	Initial Quantity	Billable Quantity
KWH	PEAK		1000	1000
KWH	OFFPEAK		800	800

Now, let's assume the rate contains charges based on the TOTAL amount of s (with the variable s representing the sum of KWH PEAK and KWH OFFPEAK). This means that the rate needs to have the array changed as follow:


Unit Of Measure	Time Of Use	SQ Identifier	Initial Quantity	Billable Quantity
KWH	PEAK		1000	1000
KWH	OFFPEAK		800	800
KWH				1800

As you can see, a new entry was added to the array. This new entry contains the sum of two existing service quantities. Notice that the new entry doesn't have an initial quantity. This is because an SQ Rule will create it and SQ Rules never populate initial quantity (only metered consumption can exist in initial quantity). To add this new entry, create an SQ Rule with the following attributes (and link it to the appropriate rates):


Field	Value
SQ Algorithm	Sum
UOM 1	KWH
TOU 1	PEAK
SQI 1
UOM 2	KWH
TOU 2	OFFPEAK
SQI 2
UOM 3
TOU 3
SQI 3
Quantity to Use	Billable Quantity (actually, it doesn't matter because both the Billable and Initial Quantities will contain the same value in this scenario).
Create a Billing Error	It depends on your situation. If all customers using this rate have time-of-use meters that need to be summed together to come up with the total kWh, then you'd want to create a billing error if the system is not supplied with the appropriate service quantities. If some customers using this rate have time-of-use meters and others just have summary meters that don't differentiate based on time-of-use, you would NOT select this option because you wouldn't want a billing error generated for customers without a time-of-use meter.