1. Revisit RTM True-Up Schedule and Invoicing
ERCOT Settlements
SEWG
08/18/2011

2. Protocols – Zonal vs Nodal
9.2.3 Initial Statements
ERCOT will issue Initial Statements by the end of the tenth (10th) day following the Operating Day. If the tenth (10th) day is not a Business Day, ERCOT will issue the Initial Statement on the next Business Day thereafter.
Nodal
9.5.4 RTM Initial Statement
If the tenth day is not a Business Day, then ERCOT shall issue the RTM Initial Statement on the next Business Day after the tenth day.
February 10, 2009

3. RTM Initial Schedule = 7 Op Days / Invoice Date RTM Initial
Operating Day
Post Date
# of days
Day of Posting
Invoice Date
11/19/2010
11/29/2010 10
Mon
12/9/2010
11/20/2010
11/30/2010
Tue
11/21/2010
12/1/2010
Wed
11/22/2010
12/2/2010
Thu
11/23/2010
12/3/2010
Fri
11/24/2010
12/6/2010 12
11/25/2010 11
11/26/2010
12/16/2010
11/27/2010
12/7/2010
11/28/2010
12/8/2010
12/10/2010
12/13/2010
12/27/2010
12/4/2010
12/14/2010
12/5/2010
12/15/2010
12/17/2010
12/20/2010
12/30/2010
= 7 Op Days /
Invoice Date
February 10, 2009

4. Protocols – Zonal vs Nodal
9.2.4 Final Statements
Final Statements will be issued at the end of the fifty-ninth (59th) calendar day following the Operating Day. In the event that the fifty-ninth calendar day falls on a weekend or holiday, then the Final Settlement Statement will be issued on the following Business Day.
Nodal
9.5.5 RTM Final Statement
ERCOT shall issue an RTM Final Statement for each Statement Recipient for a given Operating Day on the 59th day after the Operating Day, unless that 59th day is not a Business Day.
February 10, 2009

5. RTM Final Schedule = 7 Op Days / Invoice Date RTM Final Operating Day
Post Date
# of days
Day of Posting
Invoice Date
11/19/2010
1/17/2011 59
Mon
1/27/2011
11/20/2010
1/18/2011
Tue
11/21/2010
1/19/2011
Wed
11/22/2010
1/20/2011
Thu
11/23/2010
1/21/2011
Fri
11/24/2010
1/24/2011 61
11/25/2010 60
11/26/2010
2/3/2011
11/27/2010
1/25/2011
11/28/2010
1/26/2011
11/29/2010
11/30/2010
1/28/2011
12/1/2010
1/31/2011
12/2/2010
12/3/2010
2/10/2011
12/4/2010
2/1/2011
12/5/2010
2/2/2011
12/6/2010
12/7/2010
2/4/2011
12/8/2010
2/7/2011
12/9/2010
12/10/2010
2/17/2011
= 7 Op Days /
Invoice Date
February 10, 2009

6. Protocols – Zonal vs Nodal
9.2.6 True-Up Statement
True-Up Statements will be issued six (6) months following the Operating Day provided that ERCOT has received and validated usage data from at least ninety-nine percent (99%) of the total number of Electric Service Identifiers (ESI IDs)....
Methodology: 365 days / 2 = 182 days
Nodal
9.5.8 RTM True-Up Statement
ERCOT shall issue RTM True-Up Statements 180 days following the Operating Day, if ERCOT has received and validated usage data from at least 99% of the total number of Electric Service Identifiers (ESI IDs)….
February 10, 2009

7. RTM True-Up Schedule = 7 Op Days / Invoice = 9 Op Days / Invoice Date
Operating Day
Post Date
# of days
Day of Posting
Invoice Date
11/19/2010
5/20/2011
182
Fri
5/26/2011
11/20/2010
5/23/2011
184
Mon
11/21/2010
183
11/22/2010
6/2/2011
11/23/2010
5/24/2011
Tue
11/24/2010
5/25/2011
Wed
11/25/2010
Thu
11/26/2010
5/27/2011
11/27/2010
5/31/2011
185
11/28/2010
11/29/2010
6/9/2011
11/30/2010
12/1/2010
181
12/2/2010
180
12/3/2010
6/1/2011
12/4/2010
12/5/2010
6/3/2011
12/6/2010
6/6/2011
12/7/2010
12/8/2010
6/16/2011
12/9/2010
6/7/2011
12/10/2010
6/8/2011
= 7 Op Days /
Invoice
= 9 Op Days / Invoice Date
February 10, 2009

8. 6/29 has 9 RTM True-Ups in total (from zonal and nodal)
RTM True Up Schedule
6/29 has 9 RTM True-Ups in total (from zonal and nodal)
If Zonal and Nodal had same posting timeline, 7 True-Ups would have been invoiced for this week
Due to 2 day overlap, additional 2 invoices in same week
zonal posted on OD+182
Nodal posts on OD+180
The settlement schedule is defined and available in the Settlement Calendar
February 10, 2009