Distributed Renewable Energy Operating Impacts and Valuation Study

Study Background and Description
Table 1-5
APS Tariffs with Highest Number of Customers
Tariff
Description
Customers
(2007)
Percent of
All
Customers
Percent of
Residential
Customers
Percent of
Commercial
Customers
E10 Residential Classic Rate 69,731 6.56% 7.4%
E12 Residential Standard Rate 437,213 41.13% 46.2%
ET-1
ET-2
ECT-1
ECT-2
Residential Time Advantage
9:00 PM – 9:00 AM 339,594 31.94% 35.9%
Residential Time Advantage
7:00 PM – noon 36,083 3.39% 3.8%
Residential TOU (9-9) with demand
charge 54,789 5.15% 5.8%
Residential TOU (9-9) with demand
charge 8,566 0.81% 0.9%
E32 xsmall Commercial 0 – 20 kW 90,811 8.54% 77.5%
E32 small Commercial 21 – 100 kW 20,496 1.93% 17.5%
E32 medium Commercial 101 – 400 kW 4,535 0.43% 3.9%
E32 large Commercial > 400 kW 893 0.08% 0.8%
E32 xlarge Industrial 196 0.02% 0.2%
E32 TOU
xsmall Commercial TOU 0 – 20 kW 52 0.00% 0.0%
E32 TOU small Commercial TOU 21 – 100 kW 91 0.01% 0.1%
E32 TOU
medium Commercial TOU 101 – 400 kW 47 0.00% 0.0%
E32 TOU large Commercial TOU > 400 kW 20 0.00% 0.0%
E32 TOU
xlarge Industrial TOU 8 0.00% 0.0%
Total 1,063,125
Composite load profiles for each of the tariff classes were provided by APS. The load profiles
represent an average load profile for the class of customer that was derived from a group of
actual customers throughout the APS service territory. These data were utilized to evaluate the
impact of the solar DE technologies for these customers, which are typical of the customer class
represented by the rate tariff.
Table 1-6 shows a summary of energy consumption for the tariff classes evaluated in this Study.
More detailed energy consumption information and hourly load data for these tariffs is included
in Appendix D and Appendix E, respectively.
Distributed Renewable Energy Operating Impacts & Valuation Study R. W. Beck, Inc. 1-11