The Survey of TOU Rates in the United States
Enrollment Distribution Across IOUS
Share of IOU Customers Enrolled in TOU Where Available
Percent of Utilities
Offering TOU Rates
75%
60%
45%
30%
15%
0%
0-1%
1-2%
2-3%
3-4%
4-5%
5-6%
6-7%
7-8%
%6-8
9-10%
10-11%
11-12%
12-13%
13-14%
14-15%
15%+
Enrollment Rate
Retail Competition
Yes
I No
Sources and notes: Brattle analysis of EIA-861 data. Data shown for IOUS only. The EIA data
does not distinguish between enrollment in static TOU versus dynamic rates, so in some cases
TOU participation may be slightly overstated. We have made adjustments for this where
apparent (e.g., high PTR enrollment for BGE and Pepco).
Privileged and Confidential
Prepared at the Request of Counsel
Comments
60% of IOUS offering TOU rates
have enrollment rates of less than
1%
A few utilities with high
participation skew the average
upward
- Arizona Public Service, for
instance, has over half of its
residential customers enrolled in
TOU rates
Reasons for low enrollment at
other utilities include no marketing
of the TOU rate, inconvenient design
(i.e., long peak period), and/or
additional charges to cover cost of
TOU meter (where smart metering
has not been deployed)
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