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COLIN W. JACK, PECHIEF OPERATING OFFICER
Dixie Power & City of St. GeorgeSunSmart Project
Dixie Power Headquartered in Beryl
Jct. & St. George, Utah 18,000 members in
Southern UT & Northern AZ
114MW peak in summer, 420GWh/year
All-requirements member of Deseret Power
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Colin W Jack, PE3
50 countries
St. George, Utah
Southwestern Utah Elevation: 2500 ft. Sunshine 310 days / year Average annual temperature: 61F
Average high in July: 102F; average low in January: 25F
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Customers Demand Solar Option 2006 Dixie Power received on average a
request per day regarding solar power options
2006 Dixie Power adopted a net metering tariff to accommodate requests for solar installations
2007 Dixie Power & St George City brain storm the idea of a large scale solar facility that could be sold to customers in lieu of individual roof top units
2008 Dixie Power & St George City build SunSmart facility
SunSmart can grow up to 15 acres, which would accommodate 2,000 kilowatts (“kW”) of solar panels.
Single axis tracking adjusted 4 times/year. Residents can purchase shares in 0.5 or 1.0
kW increments; 1.0 kW of panels produces about 150 kilowatt-hours (“kWh”) per month. (Typical residence uses 1,500 kWh per month.)
Central facility avoids maintenance hassles, community restrictions, and installation issues
SunSmart characteristics6
$1,000,000 direct materials & labor for 100kW
State Legislature extends 20% tax rebates to SunSmart
St. George City applied for Federal Stimulus Purchased additional 150kW of solar panels Total Cost Phase 1 + Phase 2 =
$1,320,000 ÷ 250kW = $5,280/kW Dixie & St. George set subscription rate at
$5,000/kW
SunSmart – development7
Major promotion Hired high power (high $) PR firm to
promote Multimedia blitz: TV, radio, internet,
newspapers Governor of Utah inaugurated & cut
ribbon
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Subscription rates Of potential 45,000 customers:
25 customers purchased 26.5kW in first year (2008)
1 additional customer purchased 1kW in 2010
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$-
$1,000
$2,000
$3,000
$4,000
$5,000
$6,000
$7,000
$8,000
Local SubsidyFederal SubsidyState Tax CreditNet Cost
Cost Breakdown
SunSmart costs – total
48% Subsidized*
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*Costs don’t include:• 15 acres land• A&G• Overheads• Tax free purchases
SunSmart costs to consumer
$ 4,000 net costor
$26.40/month*
150kWh/kW/mo avg. output
= 18¢ / kWhCost / kWh for Dixie customer5.35¢ / kWh
329% premium for solar
*Terms: 5% for 20 year panel lifetime
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$-
$1,000
$2,000
$3,000
$4,000
$5,000
$6,000
$7,000
$8,000
Local SubsidyFederal SubsidyState Tax CreditNet Cost
Cost Breakdown
Maintenance Issues: Monthly cleaning – or loss of production Wind – unexpected north wind Manufacturer’s defects – replaced all
original panels under warranty
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
2008 2009 2010 2011 2012 2013 2014 MonthlyAverage
kWh
Added 9kWAdded 141kW
Fire
SunSmart relative production
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2011 2012 2013 -
20
40
60
80
100
120
140
160
Average kWh/kW/month
SunSmartNet Meter
Power supplied limited to availability of sunlight
Solar limitations
Probable cloud blockages
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 240%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%Comparison of Hourly Load vs. Hourly Solar Power
Dixie's St. George Load
SunSmart Output
Hour of Peak Day, July 17, 2009
Rat
io: H
ourly
to P
eak
Solar’s contributions to peak load
Solar output falls off daily just as
load in St. George peaks.
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Summary Power delivery to system does not match
peak demand Even with generous subsidies, solar power
expensive Solar power producing 20% equivalent hours Low subscription rate for SunSmart Visit: www.sgsunsmart.com or
www.dixiepower.com
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