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https://www.nist.gov/el/energy-and-environment-division-73200/heat-transfer-alternative-energy-systems/photovoltaic-0

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Engineering LaboratoryBuilding Energy & Environment Division 

## Heat Transfer and Alternative Energy Systems Group

-  Photovoltaic Testbeds  Expand or Collapse    -  Parking Lot Canopy Array 
  -  Ground Mount Array 
  -  Roof Tilted Array 
  -  Rooftop Weather Station 
  -  Rooftop Module Test Station 

# Parking Lot Canopy Array

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At the parking lot site, a PV canopy was erected over each north-south parking row.  To promote water shedding, each canopy is tilted 5 degrees down from horizontal.  As a result, four of eight canopies tilt to the west, and the other four of eight canopies tilt to the east. The modules are installed with their longer dimension running east-west.  Each shed contains 129 modules laid out in a 3 (E-W) x 43 (N-S) grid.  The rated DC power output at this site is 243 kW.  Seven circuits feed the single inverter, which is located under the southern end of sheds #4 and #5.  Although burdensome to implement from a construction standpoint, all modules in a given series string are at the same tilt in an effort to minimize mismatch within a string – i.e., the effects from differences in the plane-of-shed irradiances, west tilt versus east tilt. An ice shield is installed along the lower edge of each shed canopy. Each monocrystalline silicon module has a rated power of 235 W and a rated efficiency of 14.4 %.

EnergyEnvironment

## Contacts

                -  William M. Healy  william.healy@nist.gov      (301) 975-4922   

-  **‹** Photovoltaic Testbeds 
-  Ground Mount Array **›** 

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