1 | Building Technologies Program eere.energy.gov The Parker Ranch installation in Hawaii 

# BUILDING TECHNOLOGIES PROGRAM

Distribution Transformers

Energy Conservation Program LBNL Staff on behalf of

U.S. Department of Energy

Energy Efficiency & Renewable Energy



# November 3, 20112 | Building Technologies Program eere.energy.gov 

# Draft Life

**- Cycle Cost, Payback Period Sensitivity Results: High and** 

**Low Material Prices for Medium Voltage Liquid**

**- Immersed** 

**Transformers**

Prepared for the Medium Voltage Distribution Transformers Negotiated

Rulemaking Working Group

November 7, 2011

**Contents**

• Life

- Cycle Cost Low Price Scenario Results for Design Lines 1 – 5

• Payback Period Low Price Scenario Results for Design Lines 1 – 5

• Life

- Cycle Cost High Price Scenario Results for Design Lines 1 – 5

• Payback Period High Price Scenario Results for Design Lines 1 – 5 

# Contents3 | Building Technologies Program eere.energy.gov 

# Design Line 1 LCC Results: 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6

Efficiency (%) 99.16% 99.22% 99.25% 99.31% 99.42% 99.50%



### Transformers with Net Increase in LCC (%) 40.05% 0.15% 0.15% 0.70% 1.45% 16.60%



### Transformers with No Impact on LCC (%) 0.15% 0.15% 0.15% 0.00% 0.00% 0.00%



### Transformers with Net LCC Savings (%) 59.80% 99.70% 99.70% 99.30% 98.55% 83.40%



### Mean LCC Savings ($) 227 1133 1133 1064 1375 961



### Median LCC Savings ($) 92 1136 1136 1048 1282 737

- 1000

- 500 0 500 1000 1500 2000 2500 3000 3500

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6Average LCC Savings ($)



### Efficiency Level 

### Design Line 1 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average4 | Building Technologies Program eere.energy.gov 

# Design Line 2 LCC Results : 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Efficiency (%) 99.00% 99.07% 99.11% 99.18% 99.31% 99.41% 99.46%



### Transformers with Net LCC Cost (%) 6.60% 2.25% 2.85% 21.95% 26.00% 34.65% 37.30%



### Transformers with No Change in LCC (%) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%



### Transformers with Net LCC Benefit (%) 93.40% 97.75% 97.15% 78.05% 74.00% 65.35% 62.70%



### Mean LCC Savings ($) 651 722 700 227 146

- 58

- 73



### Median LCC Savings ($) 713 768 749 630 497 260 222

- 3500 - 3000 - 2500 - 2000 - 1500 - 1000

- 500 0 500 1000 1500 2000

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average LCC Savings ($)



### Efficiency Level 

### Design Line 2 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average5 | Building Technologies Program eere.energy.gov 

# Design Line 3 LCC Results : 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Efficiency (%) 99.48% 99.51% 99.54% 99.57% 99.61% 99.69% 99.73%



### Transformers with Net Increase in LCC (%) 5.10% 4.35% 0.55% 0.45% 0.75% 1.75% 6.50%



### Transformers with No Impact on LCC (%) 0.55% 0.50% 0.05% 0.05% 0.00% 0.00% 0.00%



### Transformers with Net LCC Savings (%) 94.35% 95.15% 99.40% 99.50% 99.25% 98.25% 93.50%



### Mean LCC Savings ($) 2334 6787 8103 8690 10085 11408 9708



### Median LCC Savings ($) 2123 7322 8374 8977 10243 10952 8633

- 5000 0 5000 10000 15000 20000 25000

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average LCC Savings ($)



### Efficiency Level 

### Design Line 3 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average6 | Building Technologies Program eere.energy.gov 

# Design Line 4 LCC Results : 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Efficiency (%) 99.16% 99.22% 99.25% 99.31% 99.42% 99.50% 99.60%



### Transformers with Net LCC Cost (%) 0.15% 0.05% 0.05% 0.05% 0.15% 0.95% 4.75%



### Transformers with No Change in LCC (%) 1.00% 1.00% 1.00% 1.00% 0.35% 0.00% 0.00%



### Transformers with Net LCC Benefit (%) 98.85% 98.95% 98.95% 98.95% 99.50% 99.05% 90.15%



### Mean LCC Savings ($) 1422 5077.9 5077.9 5143.2 5191.1 5089 4131



### Median LCC Savings ($) 1056 5148.1 5148.1 5218.9 5229.4 4949 3863

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average LCC Savings ($)



### Efficiency Level 

### Design Line 4 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average7 | Building Technologies Program eere.energy.gov 

# Design Line 5 LCC Results : 2006

– 25% Material Prices

**Efficiency Level**

**1 2**  **3 4**  **5 6** 

Efficiency (%) 99.48% 99.51% 99.54% 99.57% 99.61% 99.69%



### Transformers with Net Increase in LCC (%) 0.95% 2.40% 1.80% 1.95% 3.25% 8.15%



### Transformers with No Impact on LCC (%) 0.40% 0.20% 0.00% 0.00% 0.00% 0.00%



### Transformers with Net LCC Savings (%) 98.65% 97.40% 98.20% 98.05% 96.75% 91.85%



### Mean LCC Savings ($) 7306 21443 22427 23323 23202 20292



### Median LCC Savings ($) 6779 22739 23649 24399 24258 20764

- 10000 0 10000 20000 30000 40000 50000

EL 1 EL 2 EL 3 EL 4 EL 5 EL 6Average LCC Savings ($)



### Efficiency Level 

### Design Line 5 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average8 | Building Technologies Program eere.energy.gov 

# Design Line 1 PBP Results : 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6

Mean Payback (Years) 27.8 7.7 7.7 9.6 10.9 17.9



### Median Payback (Years) 16.5 7.4 7.4 9.2 10.5 17.0



### Transformers having Well Defined Payback (%) 85.60% 99.85% 99.85% 99.95% 100.00% 100.00%



### Transformers having Undefined Payback (%) 14.40% 0.15% 0.15% 0.05% 0.00% 0.00%



### Mean Retail Cost ($) 1,801 1,990 1,990 2,062 2,263 2,672



### Mean Installation Costs ($) 2,226 2,263 2,263 2,336 2,411 2,604 

### Mean Operating Costs ($) 200 151 151 149 127 122



### Mean Incremental First Cost ($) 271 497 497 642 918 1,521 

### Mean Operating Cost Savings ($) 18 67 67 70 91 97



### Payback of Average Transformer 14.8 7.4 7.4 9.2 10.1 15.7

0 20 40 60 80 100 120

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6Average Payback Period (years)



### Efficiency Level 

### Design Line1 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average9 | Building Technologies Program eere.energy.gov 

# Design Line 2 PBP Results : 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Mean Payback (Years) 6.4 6.4 8.2 20.2 24.0 28.2 28.7



### Median Payback (Years) 3.3 4.8 6.4 9.2 14.5 19.5 20.6



### Transformers having Well Defined Payback (%) 98.40% 99.90% 99.75% 99.75% 99.65% 99.70% 99.80%



### Transformers having Undefined Payback (%) 1.60% 0.10% 0.25% 0.25% 0.35% 0.30% 0.20%



### Mean Retail Cost ($) 1,156 1,186 1,228 1,282 1,463 1,627 1,949



### Mean Installation Costs ($) 1732 1775 1815 2354 2515 2675 2470 

### Mean Operating Costs ($) 97 92 90 86 76 72 68



### Mean Incremental First Cost ($) 148 221 304 896 1,238 1,562 1,679 

### Mean Operating Cost Savings ($) 35 40 42 46 56 60 64



### Payback of Average Transformer 4.3 5.5 7.2 19.3 22.2 26.0 26.2

0 10 20 30 40 50 60 70 80 90

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average Payback Period (years)



### Efficiency Level 

### Design Line 2 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95%10 | Building Technologies Program eere.energy.gov 

# Design Line 3 PBP Results : 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Mean Payback (Years) 10.6 5.0 5.1 5.0 5.6 8.7 14.1



### Median Payback (Years) 8.2 3.4 4.2 4.3 4.9 7.5 12.1



### Transformers having Well Defined Payback (%) 98.50% 98.40% 99.95% 99.95% 100.00% 99.95% 99.80%



### Transformers having Undefined Payback (%) 1.50% 1.60% 0.05% 0.05% 0.00% 0.05% 0.20%



### Mean Retail Cost ($) 6,783 7,190 7,609 7,718 8,181 9,889 12,532



### Mean Installation Costs ($) 4,407 4,247 4,368 4,390 4,515 4,985 5,677 

### Mean Operating Costs ($) 1,167 947 878 852 780 655 602



### Mean Incremental First Cost ($) 1,024 1,270 1,811 1,942 2,530 4,708 8,043 

### Mean Operating Cost Savings ($) 131 351 419 446 518 642 696



### Payback of Average Transformer 7.8 3.6 4.3 4.4 4.9 7.3 11.6

0 5 10 15 20 25

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average Payback Period (years)



### Efficiency Level 

### Design Line 3 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95%11 | Building Technologies Program eere.energy.gov 

# Design Line 4 PBP Results : 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Mean Payback (Years) 5.9 3.9 3.9 4.0 4.4 8.1 13.8



### Median Payback (Years) 5.8 3.7 3.7 3.8 4.1 7.5 13.0



### Transformers having Well Defined Payback (%) 98.85% 98.85% 98.85% 98.95% 99.65% 99.90% 94.90%



### Transformers having Undefined Payback (%) 1.15% 1.15% 1.15% 1.05% 0.35% 0.10% 0.00%



### Mean Retail Cost ($) 4,684 5,113 5,113 5,118 5,184 5,996 8,023



### Mean Installation Costs ($) 4,036 4,152 4,152 4,178 4,225 4,580 4,707 

### Mean Operating Costs ($) 553 379 379 375 369 325 279



### Mean Incremental First Cost ($) 375 921 921 952 1,065 2,233 4,388 

### Mean Operating Cost Savings ($) 74 247 247 251 258 302 350



### Payback of Average Transformer 5.1 3.7 3.7 3.8 4.1 7.4 12.5

0 2 4 6 8 10 12 14

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average Payback Period (years)



### Efficiency Level 

### Design Line 4 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95%12 | Building Technologies Program eere.energy.gov 

# Design Line 5 PBP Results : 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6

Mean Payback (Years) 5.1 4.8 6.4 6.8 8.8 15.6



### Median Payback (Years) 4.3 3.3 4.5 5.1 7.0 13.5



### Transformers having Well Defined Payback (%) 99.50% 98.65% 99.90% 99.90% 99.65% 100.00%



### Transformers having Undefined Payback (%) 0.50% 1.35% 0.10% 0.10% 0.35% 0.00%



### Mean Retail Cost ($) 21,665 22,828 24,292 25,165 27,829 41,967



### Mean Installation Costs ($) 7,819 8,602 8,857 9,016 9,492 9,828 

### Mean Operating Costs ($) 3,127 2,487 2,380 2,303 2,183 1,724



### Mean Incremental First Cost ($) 1,453 3,399 5,118 6,150 9,289 23,764 

### Mean Operating Cost Savings ($) 348 988 1,095 1,172 1,291 1,751



### Payback of Average Transformer 4.2 3.4 4.7 5.2 7.2 13.6

0 5 10 15 20 25 30

EL 1 EL 2 EL 3 EL 4 EL 5 EL 6Average Payback Period (years)



### Efficiency Level 

### Design Line 5 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average13 | Building Technologies Program eere.energy.gov 

# Design Line 1 LCC Results: 2008 +

25% Material Prices

Efficiency Level

1 2 3 4 5 6

Efficiency (%) 99.16% 99.22% 99.25% 99.31% 99.42% 99.50%



### Transformers with Net Increase in LCC (%) 56.90% 2.35% 2.35% 5.70% 11.50% 57.10%



### Transformers with No Impact on LCC (%) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%



### Transformers with Net LCC Savings (%) 43.10% 97.65% 97.65% 94.30% 88.50% 42.90%



### Mean LCC Savings ($) 41 872 872 716 856 56



### Median LCC Savings ($)

- 60 877 877 701 758

- 169

- 2000 - 1500 - 1000

- 500 0 500 1000 1500 2000 2500

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6Average LCC Savings ($)



### Efficiency Level 

### Design Line 1 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average14 | Building Technologies Program eere.energy.gov 

# Design Line 2 LCC Results : 2008 +

25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Efficiency (%) 99.00% 99.07% 99.11% 99.18% 99.31% 99.41% 99.46%



### Transformers with Net LCC Cost (%) 11.35% 16.40% 26.30% 28.30% 52.50% 75.55% 85.60%



### Transformers with No Change in LCC (%) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%



### Transformers with Net LCC Benefit (%) 88.65% 83.60% 73.70% 71.70% 47.50% 24.45% 14.40%



### Mean LCC Savings ($) 379 163

- 75

- 120

- 341

- 667

- 956



### Median LCC Savings ($) 468 450 343 290

- 30

- 395

- 710

- 4000 - 3500 - 3000 - 2500 - 2000 - 1500 - 1000

- 500 0 500 1000 1500

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average LCC Savings ($)



### Efficiency Level 

### Design Line 2 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average15 | Building Technologies Program eere.energy.gov 

# Design Line 3 LCC Results : 2008 +

25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Efficiency (%) 99.48% 99.51% 99.54% 99.57% 99.61% 99.69% 99.73%



### Transformers with Net Increase in LCC (%) 9.90% 6.60% 2.05% 1.40% 1.70% 6.15% 30.75%



### Transformers with No Impact on LCC (%) 0.05% 0.05% 0.00% 0.00% 0.00% 0.00% 0.00%



### Transformers with Net LCC Savings (%) 90.05% 93.35% 97.95% 98.60% 98.30% 93.85% 69.25%



### Mean LCC Savings ($) 3687 5987 6986 7499 8457 8213 4164



### Median LCC Savings ($) 2959 6528 7198 7683 8584 7731 3130

- 5000 0 5000 10000 15000 20000

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average LCC Savings ($)



### Efficiency Level 

### Design Line 3 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average16 | Building Technologies Program eere.energy.gov 

# Design Line 4 LCC Results : 2008 +

25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Efficiency (%) 99.16% 99.22% 99.25% 99.31% 99.42% 99.50% 99.60%



### Transformers with Net LCC Cost (%) 2.20% 0.30% 0.30% 0.15% 0.35% 3.55% 35.20%



### Transformers with No Change in LCC (%) 0.45% 0.45% 0.45% 0.45% 0.10% 0.00% 0.00%



### Transformers with Net LCC Benefit (%) 97.35% 99.25% 99.25% 99.40% 99.55% 96.45% 59.70%



### Mean LCC Savings ($) 1035 4543.2 4543.2 4550.4 4649.9 3843 1164



### Median LCC Savings ($) 761 4603.5 4603.5 4605.8 4705.4 3695 874

0 1000 2000 3000 4000 5000 6000 7000 8000

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average LCC Savings ($)



### Efficiency Level 

### Design Line 4 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average17 | Building Technologies Program eere.energy.gov 

# Design Line 5 LCC Results : 2008 +

25% Material Prices

**Efficiency Level**

**1 2**  **3 4**  **5 6** 

Efficiency (%) 99.48% 99.51% 99.54% 99.57% 99.61% 99.69%



### Transformers with Net Increase in LCC (%) 41.00% 3.20% 3.60% 3.85% 7.15% 52.90%



### Transformers with No Impact on LCC (%) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%



### Transformers with Net LCC Savings (%) 59.00% 96.80% 96.40% 96.15% 92.85% 47.10%



### Mean LCC Savings ($) 4170 15970 15909 16150 13989

- 97



### Median LCC Savings ($) 1669 16494 16241 16275 14252

- 895

- 30000 - 20000 - 10000 0 10000 20000 30000 40000

EL 1 EL 2 EL 3 EL 4 EL 5 EL 6Average LCC Savings ($)



### Efficiency Level 

### Design Line 5 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average18 | Building Technologies Program eere.energy.gov 

# Design Line 1 PBP Results : 2008 +

25% Material Prices

Efficiency Level

1 2 3 4 5 6

Mean Payback (Years) 40.2 11.9 11.9 14.8 17.0 28.6



### Median Payback (Years) 28.2 11.4 11.4 14.3 16.4 27.3



### Transformers having Well Defined Payback (%) 89.30% 100.00% 100.00% 100.00% 100.00% 100.00%



### Transformers having Undefined Payback (%) 10.70% 0.00% 0.00% 0.00% 0.00% 0.00%



### Mean Retail Cost ($) 2,913 3,240 3,240 3,384 3,753 4,549



### Mean Installation Costs ($) 2,222 2,260 2,260 2,335 2,411 2,604 

### Mean Operating Costs ($) 202 151 151 149 127 122



### Mean Incremental First Cost ($) 409 773 773 991 1,437 2,426 

### Mean Operating Cost Savings ($) 16 68 68 70 91 97



### Payback of Average Transformer 25.2 11.4 11.4 14.2 15.8 25.1

0 20 40 60 80 100 120

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6Average Payback Period (years)



### Efficiency Level 

### Design Line1 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average19 | Building Technologies Program eere.energy.gov 

# Design Line 2 PBP Results : 2008 +

25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Mean Payback (Years) 13.8 19.8 25.9 27.5 32.9 39.0 13.8



### Median Payback (Years) 9.3 11.0 14.3 16.8 24.8 32.2 9.3



### Transformers having Well Defined Payback (%) 99.65% 99.95% 99.90% 99.90% 99.90% 99.90% 99.65%



### Transformers having Undefined Payback (%) 0.35% 0.05% 0.10% 0.10% 0.10% 0.10% 0.35%



### Mean Retail Cost ($) 1,920 1,967 2,060 2,150 2,486 2,771 1,920



### Mean Installation Costs ($) 1784 2087 2292 2367 2514 2675 1784 

### Mean Operating Costs ($) 97 92 90 86 76 72 97



### Mean Incremental First Cost ($) 379 729 1,027 1,192 1,675 2,120 379 

### Mean Operating Cost Savings ($) 32 38 40 44 53 58 32



### Payback of Average Transformer 11.7 19.4 26.0 27.1 31.5 36.8 11.7

0 20 40 60 80 100 120

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average Payback Period (years)



### Efficiency Level 

### Design Line 2 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95%20 | Building Technologies Program eere.energy.gov 

# Design Line 3 PBP Results : 2008 +

25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Mean Payback (Years) 9.3 7.3 7.7 7.5 8.7 14.1 23.1



### Median Payback (Years) 6.8 4.9 6.3 6.4 7.6 12.3 20.4



### Transformers having Well Defined Payback (%) 96.60% 98.45% 100.00% 100.00% 100.00% 99.95% 99.85%



### Transformers having Undefined Payback (%) 3.40% 1.55% 0.00% 0.00% 0.00% 0.05% 0.15%



### Mean Retail Cost ($) 11,858 12,109 12,865 13,054 13,977 17,237 22,210



### Mean Installation Costs ($) 4,171 4,251 4,370 4,385 4,518 4,989 5,681 

### Mean Operating Costs ($) 1,060 948 879 853 780 656 603



### Mean Incremental First Cost ($) 1,427 1,758 2,633 2,837 3,892 7,624 13,289 

### Mean Operating Cost Savings ($) 226 338 407 434 506 631 683



### Payback of Average Transformer 6.3 5.2 6.5 6.5 7.7 12.1 19.4

0 5 10 15 20 25

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average Payback Period (years)



### Efficiency Level 

### Design Line 3 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95%21 | Building Technologies Program eere.energy.gov 

# Design Line 4 PBP Results : 2006

– 25% Material Prices

Efficiency Level

1 2 3 4 5 6 7

Mean Payback (Years) 11.0 6.6 6.6 6.6 7.0 12.6 22.8



### Median Payback (Years) 10.8 6.2 6.2 6.2 6.5 11.9 21.8



### Transformers having Well Defined Payback (%) 99.45% 99.45% 99.45% 99.50% 99.90% 99.90% 94.90%



### Transformers having Undefined Payback (%) 0.55% 0.55% 0.55% 0.50% 0.10% 0.10% 0.00%



### Mean Retail Cost ($) 7,854 8,620 8,620 8,629 8,755 10,203 13,911



### Mean Installation Costs ($) 4,041 4,179 4,179 4,179 4,214 4,586 4,707 

### Mean Operating Costs ($) 558 376 376 376 365 323 279



### Mean Incremental First Cost ($) 668 1,571 1,571 1,580 1,741 3,561 7,392 

### Mean Operating Cost Savings ($) 70 252 252 253 263 305 352



### Payback of Average Transformer 9.5 6.2 6.2 6.3 6.6 11.7 21.0

0 2 4 6 8 10 12 14 16 18 20

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average Payback Period (years)



### Efficiency Level 

### Design Line 4 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95%22 | Building Technologies Program eere.energy.gov 

# Design Line 5 PBP Results : 2008 +

25% Material Prices

Efficiency Level

1 2 3 4 5 6

Mean Payback (Years) 27.6 8.7 10.9 11.5 15.1 28.1



### Median Payback (Years) 13.7 7.0 9.0 9.9 13.2 25.7



### Transformers having Well Defined Payback (%) 88.65% 99.35% 99.95% 100.00% 99.80% 100.00%



### Transformers having Undefined Payback (%) 11.35% 0.65% 0.05% 0.00% 0.20% 0.00%



### Mean Retail Cost ($) 38,113 39,202 41,712 43,106 47,943 73,255



### Mean Installation Costs ($) 7,968 8,604 8,856 9,016 9,491 9,828 

### Mean Operating Costs ($) 3,024 2,487 2,380 2,308 2,183 1,724



### Mean Incremental First Cost ($) 4,275 5,999 8,762 10,316 15,628 41,277 

### Mean Operating Cost Savings ($) 336 873 981 1,052 1,177 1,636



### Payback of Average Transformer 12.7 6.9 8.9 9.8 13.3 25.2

0 20 40 60 80 100 120

EL 1 EL 2 EL 3 EL 4 EL 5 EL 6Average Payback Period (years)



### Efficiency Level 

### Design Line 5 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average