Mobile Solar Tracker Facility

Metadata Updated: March 8, 2017

NIST[HTML_REMOVED]s mobile solar tracking facility is used to characterize the electrical performance of photovoltaic panels. It incorporates meteorological instruments, a solar spectroradiometer, a data acquisition system, and a single-channel photovoltaic curve tracer. Precision spectral pyranometers are used to measure total (beam plus diffuse) solar radiation. Two instruments are used to provide redundant measurements. A pyrheliometer is used to measure the beam component of solar radiation. Long-wave radiation, greater than 3[HTML_REMOVED] m, is measured using a precision infrared radiometer. A three-cup anemometer assembly is used to measure wind speed. The ambient temperature is measured using a perforated tip, Type-T thermocouple sensor enclosed in a naturally ventilated multi-plate radiation shield. The output signals of the meteorological instruments and thermocouples attached to the building integrated photovoltaic panels are measured using a data acquisition system. Spectral radiation data from 300 to 1100 nm is obtained using a spectroradiometer. The solar tracker[HTML_REMOVED]s photovoltaic array tester measures and records the current and voltage (I-V) characteristics of the panels under evaluation. The array tester is capable of measuring panels or groups of panels with power outputs ranging from 10 watts to 36 kilowatts. Irradiance and temperature loads from a reference cell and thermocouple probe are recorded and used to normalize the data to user selected loads of irradiance and temperature. In addition to sweeping the panel I-V curve and storing the measured values, the curve tracer calculates the values of maximum output power, open circuit voltage, closed circuit current, and fill factor. The data acquisition system can accommodate up to 60 transducers.Specifications / Capabilities:The mobile solar tracking facility can be operated in the following tracking modes:Azimuth and Elevation TrackingAzimuth TrackingElevation TrackingAzimuth Tracking with User Selected OffsetElevation Tracking with User Selected OffsetFixed PositionUp to four photovoltaic modules can be mounted on the facility simultaneously. The facility can be operated over an azimuth range of [HTML_REMOVED] 135[HTML_REMOVED] and over an elevation range from horizontal to vertical.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017

Metadata Source

Harvested from Federal Laboratory Consortium Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017
Publisher Federal Laboratory Consortium
Unique Identifier AF71A9EC-A66C-4C04-84CD-6092D2660B2A
Maintainer Email
Public Access Level public
Metadata Context
Schema Version
Catalog Describedby
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Harvest Source Id 5859cfed-553c-48de-a478-b67b5225f6fc
Harvest Source Title Federal Laboratory Consortium Data.json
Sizesqft 0
Source Datajson Identifier True
Source Hash 0c495145dee9c75a9301a87d532356fb6267e8c3
Source Schema Version 1.1

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