The document summarizes a solar-assisted electric vehicle charging project in Tennessee led by Oak Ridge National Laboratory (ORNL). ORNL received $6.8 million from the Department of Energy to install solar-assisted EV charging stations across the state. Over 125 charging stations have been installed at locations like ORNL, Nissan, universities, and cities. Data from stations at ORNL show most drivers arrive with their batteries around 40% depleted. Future plans include adding more fast charging stations along major highways and in metropolitan areas.

1. Solar-Assisted EV
Charging Update
TDEC Conference
Kingsport, Tennessee
March 13, 2013

2. ORNL is DOE’s largest science
and energy laboratory
$1.65B
budget
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most intense
neutron
source
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employees
World-class
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reactor
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guests
annually
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modernization
investment
Nation’s
largest
materials
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portfolio
Most
powerful open
scientific
computing
facility
Nation’s
most diverse
energy portfolio
Managing
billion-dollar
U.S. ITER
project
2 Green Economy 1302

3. 3 Managed by UT-Battelle
for the U.S. Department of Energy
3 Managed by UT-Battelle
for the U.S. Department of Energy
Solar-Assisted EV Charging Project
• In August 2009, ORNL was awarded $6.8 million for the
installation of solar-assisted EV charging stations in
Tennessee. This was part of a larger DOE grant to
Ecotality for the deployment of EV charging stations in
five states
• The grant to ORNL required a 50/50 cost share match
from regional partners. The majority of the cost share
has been, or will be met, by the State of Tennessee,
TVA, EPRI, and Nissan.
• The final part of the cost share match is the State of
Tennessee project.
• We have also enjoyed great partnerships and in-kind
support from the cities, distributors, and universities
with whom we have worked.

4. 4 Managed by UT-Battelle
for the U.S. Department of Energy
4 Managed by UT-Battelle
for the U.S. Department of Energy
Levels of EV Charging
Voltage AC/DC
Time for
Full Leaf
Charge (24
kwh)
Range
Level 1 110 AC ~20 hours 4-5 miles
per hour
of
charging
Level 2 220 AC ~7 hours 12 miles
per hour
of
charging
Fast
Charger
480 DC 30 minutes
(for 80%
charge)
80 miles
per half-
hour of
charging

5. 5 Managed by UT-Battelle
for the U.S. Department of Energy
5 Managed by UT-Battelle
for the U.S. Department of Energy
Levels of EV Charging
Level 2DC Fast Charger

6. 6 Managed by UT-Battelle
for the U.S. Department of Energy
6 Managed by UT-Battelle
for the U.S. Department of Energy
Regional Solar-Covered ParkingProject Components
2.0 kw of solar per
parking space
Electric vehicle
Charging system (EVSE)
Level 2
External
battery
Grid connection

7. 7 Managed by UT-Battelle
for the U.S. Department of Energy
7 Managed by UT-Battelle
for the U.S. Department of Energy
Locations of Solar-Assisted
Charging in Tennessee
10 stations
in Memphis
22 stations
10 stations
30 stations
at Nissan
25 stations
at ORNL
22 Stations
Knoxville and
UTK
6 stations
at EPRI
Original map overlays
by Ecotality

8. 8 Managed by UT-Battelle
for the U.S. Department of Energy
8 Managed by UT-Battelle
for the U.S. Department of Energy
ORNL: 25 Solar charging stations

9. 9 Managed by UT-Battelle
for the U.S. Department of Energy
9 Managed by UT-Battelle
for the U.S. Department of Energy
Completed Installations
ORNL/EPRI
Level 2
charges
12 kW
solar PV
array
30 kWh
battery
bank
EPRI Installation 6-solar assisted stations
2 Clipper Creek level 2 chargers
2 EVSE LLC level 2 chargers
2 Eaton level 2 chargers
ORNL Installation 25-solar assisted stations
http://ExtWebApps.ornl.gov/PVEV_ext
Blink
level 2
chargers
47 kW
solar PV
array
60 kWh
battery
bank

10. 10 Managed by UT-Battelle
for the U.S. Department of Energy
10 Managed by UT-Battelle
for the U.S. Department of Energy
Nissan HQ Solar-Assisted EV
Charging Station, Franklin, TN

11. 11 Managed by UT-Battelle
for the U.S. Department of Energy
11 Managed by UT-Battelle
for the U.S. Department of Energy
Completed Installations
NISSAN
Blink
level 2
chargers
19kW
solar PV
array
24 kWh
battery
bank
Franklin 18-solar assisted stationsSmyrna, Administration Building
9-solar assisted stations
AeroViro
-nment
level 2
chargers
38 kW
solar PV
array
24 kWh
battery
bank

12. 12 Managed by UT-Battelle
for the U.S. Department of Energy
12 Managed by UT-Battelle
for the U.S. Department of Energy
Completed Installation Nissan:
3 solar assisted stations
Blink
level 2
chargers
6.5 kW
solar PV
array
24 kWh
battery
bank
Battery Plant, Smyrna

13. 13 Managed by UT-Battelle
for the U.S. Department of Energy
13 Managed by UT-Battelle
for the U.S. Department of Energy
Completed Installation Nashville:
8 solar assisted stations
Blink
level 2
chargers
17.2 kW
solar PV
array
13 kWh
battery
bank
LP Field – Sports Authority

14. 14 Managed by UT-Battelle
for the U.S. Department of Energy
14 Managed by UT-Battelle
for the U.S. Department of Energy
UT Agriculture Campus
Completed Installation
UT-Knoxville: 6 solar assisted stations
Blink
level 2
chargers
14.4 kW
solar PV
array
10 kWh
battery
bank

15. 15 Managed by UT-Battelle
for the U.S. Department of Energy
15 Managed by UT-Battelle
for the U.S. Department of Energy
University of Tennessee, Knoxville:
12 solar-assisted charging stations
Blink
level 2
chargers
14.4 kW
solar PV
arrays
10 kWh
battery
banks

16. 16 Managed by UT-Battelle
for the U.S. Department of Energy
16 Managed by UT-Battelle
for the U.S. Department of Energy
Civic Coliseum, Knoxville:
6 solar-assisted charging stations
Blink
level 2
chargers
14.4 kW
solar PV
array
6.7
kWh
battery
bank
Solar panelsRibbon cutting, September 2012

17. 17 Managed by UT-Battelle
for the U.S. Department of Energy
17 Managed by UT-Battelle
for the U.S. Department of Energy
Blink
level 2
chargers
10 kW
solar
PV
array
8.4
kWh
battery
bank
Solar panels location
Market Square Garage, Knoxville:
4 solar-assisted charging stations
Charging station

18. 18 Managed by UT-Battelle
for the U.S. Department of Energy
18 Managed by UT-Battelle
for the U.S. Department of Energy
State Of Tennessee Site Nashville:
4 solar-assisted charging stations
Blink
level 2
chargers
8.6 kW
solar PV
array
6.7
kWh
battery
bank
4th and Harrison

19. 19 Managed by UT-Battelle
for the U.S. Department of Energy
19 Managed by UT-Battelle
for the U.S. Department of Energy
Completed Installation Vanderbilt
University: 10 solar-assisted
charging stations
Eaton
level 2
chargers
20 kW
solar PV
array
3 kWh
battery
bank

20. 20 Managed by UT-Battelle
for the U.S. Department of Energy
20 Managed by UT-Battelle
for the U.S. Department of Energy
Completed Installation Chattanooga:
6 solar-assisted charging stations
Eaton
level 2
chargers
12 kW
solar PV
array
3.0
kWh
battery
bank
Theater Group

21. 21 Managed by UT-Battelle
for the U.S. Department of Energy
21 Managed by UT-Battelle
for the U.S. Department of Energy
Completed Installation
Memphis: 10 solar assisted stations
Eaton
level 2
chargers
20 kW
solar PV
array
3.0
kWh
battery
bank
Shelby Farms

22. 22 Managed by UT-Battelle
for the U.S. Department of Energy
22 Managed by UT-Battelle
for the U.S. Department of Energy
ORNL,
Q3,
Leaf
0
50
100
150
200
250
0 10 20 30 40 50 60 70 80 90 100
Frequency
Percentage of EV Battery Filled per Charge (%)
Percentage of Nissan Leaf Battery Filled per Charge
DATA ANALYSIS AT ORNL
Drivers at ORNL tend to
arrive with their Leaf
batteries 40% depleted

23. 23 Managed by UT-Battelle
for the U.S. Department of Energy
23 Managed by UT-Battelle
for the U.S. Department of Energy
Locations of DC Fast Chargers
in Tennessee
Existing
Original map overlays
by Ecotality

24. 24 Managed by UT-Battelle
for the U.S. Department of Energy
24 Managed by UT-Battelle
for the U.S. Department of Energy
Locations of DC Fast Chargers
in Tennessee
Existing
Future
Original map overlays
by Ecotality

25. 25 Managed by UT-Battelle
for the U.S. Department of Energy
25 Managed by UT-Battelle
for the U.S. Department of Energy
Project Priorities
• Add DC Fast Charging along the I-40
corridor (to NC state line)
• Add DC Fast Charging in metropolitan
areas
• Add Level 2 Charging in metropolitan
areas