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					Photovoltaic Panels on Cronin’s House

 System Cost:
 $7.50 / Watt
                               Power Production Time-series
AC Power (kW / m2)




                     Research on: Reliability, Efficiency, Power forecasting

                     Contact: Dr. Alex Cronin,   cronin@physics.arizona.edu
                                                                      PV system added
                                                                      November 2007
                   100
Electricity Bill ($)




                       80

                       60

                       40

                            Year: 2005    Year: 2006    Year: 2007      Yr: 2008
                       20   Total: $754   Total: $686   Total: $555     Ttl: $159



                        0
                            2005          2006           2007              2008         2009
Fuse            TEP
        meter
 box            Grid




house
  PV
 Panels


DC



           AC
                        Net
Inverter        Fuse            TEP
                        meter
                 box            Grid




                house
                5000

                4000
kWh Generated




                3000

                2000

                1000

                   0
                       1/1/2008   7/1/2008   1/1/2009
                                     Date
TEP / UA Solar Test Yard Research
                                  23 Inverters

                                                 Thin Si,
Photovoltaic Modules at the
TEP SOLAR TEST YARD
                                          CIGS



                                      Poly Si




   A Field Laboratory
   to study


                          Cost
                        Reliability
                      Efficiency
                    Storage
                                                            Alex Cronin
                  Transmission                              UA Physics
Rated Power
2,640 Watts peak
       Panel Temperature




Air
Temp
                                             Sharp Panels & Aurora inverter
                         0.12                (rated 14 %)


AC Power / Light Power   0.10

                         0.08
                                 Unisolar Panels & Fronius Inverter
                                 (rated 7 %)
                         0.06

                         0.04

                         0.02
                                                     Occurance


                         0.00
                                10      20     30     40      50
                                        Panel Temperature (C)
Partial Shade turns a system off.
                   4000
                                                Sharp / Aurora (#1)

                   3500

                   3000
AC Power (Watts)




                   2500
                                               Unisolar / Fronius (#4)

                   2000

                   1500

                   1000                          Kyocera / Xantrex (#2)
                                                 Sanyo / Sunnyboy (#5)
                    500

                      0
                          6   7   8   9   10     11 12 13 14              15   16   17   18
                                               Time of day (hour)
Findings:

Partial shade is a big problem

Temperature de-rating is significant

Panels rated 1 kW can produce 1700 kWh / yr




Next: National perspectives, new research
PV module production in MW
PV cell efficiency improvements
  PV Costs exhibit a “learning curve”




Source: Department of Energy ERFC Workshop
Prism Solar Technologies inc.
May reduce cost to
$1 / Watt
    Application in Solar Energy




• With a specially designed holographic optical element
  (HOE), a large portion of the expensive silicon
  photovoltaic (PV) cells in a solar panel can be
  replaced
• With this Holographic Planar Concentrator™ (HPC)
  technology, the solar modules produce more energy in
  all conditions when compared to a standard module
  with an equal area of silicon PV cells.
Application in Solar Energy
     Other ways to Reduce Cost
•   Materials: CIGS, CdTe, organics,
•   Solar Grade Silicon
•   Other Concentrators
•   Solar thermal for electrical generation
                2nd st. Parking Garage
Mountain Ave.
Solar Fountain
Outreach Tool:
Sunlight  work


Available from Physics
Lecture Demo Room

Larry Hoffman
Laboratory Coordinator
hoffman@physics.arizona.edu
Office: PAS 120
Phone: 520-621-6826
                  Campus Rec Center with Solar
6th St
   Highland Ave

				
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