This document summarizes pricing information received from two electricity suppliers, Constellation and MC Squared, for a municipal electricity aggregation. It provides tables comparing the price per kilowatt hour for different renewable energy mixes and contract lengths. A 100% renewable energy option for a 12-month contract is the best deal, saving a typical residential customer $264 per year compared to the local utility rate. Other nearby communities that have conducted similar aggregations are also shown for comparison.

1. 1
Dave Stoneback
Director of Utilities
Electricity Aggregation
Selection of Electric Supplier, Agreement
Term and Percentage of Renewable Energy

2. 2
Table 1 – Summary of Pricing Received
Constellation MC Squared
First
Energy
Energy Mix Cost per kilowatt hour ($ / kWh)
12 month 24 month 12 month 24 month
IL RPS Compliant (7%) $0.04690 $0.05166 $0.04712 $0.05186
Non
Responsive75% Renewable Energy $0.04770 $0.05274 $0.04786 $0.05261
100% Renewable
Energy $0.04797 $0.05310 $0.04809 $0.05285

3. 3
Table 2 – Term Price Difference
Energy Mix Cost ($ / kWh)
12 month 24 month % Difference
IL RPS Compliant (7%) $0.04690 $0.05166 10.15
75% Renewable Energy $0.04770 $0.05261 10.29
100% Renewable Energy $0.04797 $0.05285 10.17

4. 4
Table 3 – Renewable Energy Mix Price
Difference
Cost Increase $ / kWh
Renewable Energy Option $ / kWh
Compared to IL
RPS (7%)
Compared to
75%
IL RPS Compliant (7%) $ 0.04690 - -
75% Renewable Energy $ 0.04770 $ 0.0008 -
100% Renewable Energy $ 0.04797 $ 0.0011 $ 0.00027

5. 5
Table 4 – Summary of Average Cost Savings
Price $ per
kWh
(12 month
term)
Estimated
Annual
Supply Cost
Year 1 Savings
from ComEd
Price
ComEd Supply - Price to Compare $0.07733 $ 696
IL RPS Compliant (7%) $0.04690 $ 422 $ 274
75% Renewable Energy $0.04770 $ 429 $ 267
100% Renewable Energy $0.04797 $ 432 $ 264
Using 100% Renewable Energy, the typical residential customer will save $264 annually
or $22 / month compared to the current ComEd tariff rate.

6. 6
Table 5 – Neighboring Communities
Pricing Comparison
Community /
Buying Group
Price
($ / kWh)
Agreement Details
%
renewable
energy
Awarded
Evanston $0.04690 1-year contract 7% Spring 2012
Evanston $0.04797 1-year contract 100% Spring 2012
Northwest Suburban
Electricity Buying
Group
$0.04775
1-year contract with
option to extend for 2
more years
100% Spring 2012
North Shore
Electricity
Aggregation
Consortium
$0.04836
3-year contract with new
prices each 12 months
7% Spring 2012
Lincolnwood,
Grayslake &
Oak Brook
$0.05520 2-year contract 7% Fall 2011
Oak Park $0.05780 2-year contract 100% Fall 2011

7. 7
Questions?

8. 8
Table 3 – Renewable Energy Mix Price
Difference – 24 month term
Cost Increase $ / kWh
Renewable Energy Option $ / kWh
Compared to IL
RPS (7%)
Compared to
75%
IL RPS Compliant (7%) $ 0.05166 - -
75% Renewable Energy $ 0.05261 $ 0.00095 -
100% Renewable Energy $ 0.05285 $ 0.00119 $ 0.00024

9. 9
Table 4 – Summary of Average Cost Savings -
24 month term
Price $ per
kWh
(24 month
term)
Estimated
Annual
Supply Cost
Year 1 Savings
from ComEd
Price
ComEd Supply - Price to Compare
$0.07733 $ 696
IL RPS Compliant (7%) $ 0.05166 $ 465 $ 231
75% Renewable Energy $ 0.05261 $ 473 $ 223
100% Renewable Energy $ 0.05285 $ 476 $ 220
Using 100% Renewable Energy, the typical residential customer will save $220 annually
or $18.33 / month compared to the current ComEd tariff rate.

10. 10
History of Electricity Prices