ASTM_E_2848_-_13.pdf

Designation:E284813Standard Test Method forReporting Photovoltaic Non-Concentrator SystemPerformance1This standard is issued under the fixed designation E2848;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method provides measurement and analysisprocedures for determining the capacity of a specific photovol-taic system built in a particular place and in operation undernatural sunlight.1.2 This test method is used for the following purposes:1.2.1 acceptance testing of newly installed photovoltaicsystems,1.2.2 reporting of dc or ac system performance,and1.2.3 monitoring of photovoltaic system performance.1.3 This test method should not be used for:1.3.1 testing of individual photovoltaic modules for com-parison to nameplate power ratings,1.3.2 testing of individual photovoltaic modules or systemsfor comparison to other photovoltaic modules or systems,1.3.3 testing of photovoltaic systems for the purpose ofcomparing the performance of photovoltaic systems located indifferent places.1.4 In this test method,photovoltaic system power isreported with respect to a set of reporting conditions(RC)including:solar irradiance in the plane of the modules,ambienttemperature,and wind speed(see Section 6).Measurementsunder a variety of reporting conditions are allowed to facilitatetesting and comparison of results.1.5 This test method assumes that the solar cell temperatureis directly influenced by ambient temperature and wind speed;if not the regression results may be less meaningful.1.6 The capacity measured according to this test methodshould not be used to make representations about the energygeneration capabilities of the system.1.7 This test method is not applicable to concentratorphotovoltaic systems;as an alternative,Test Method E2527should be considered for such systems.1.8 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.9 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D6176 Practice for Measuring Surface Atmospheric Tem-perature with Electrical Resistance Temperature SensorsE772 Terminology of Solar Energy ConversionE824 Test Method for Transfer of Calibration From Refer-ence to Field RadiometersE927 Specification for Solar Simulation for PhotovoltaicTestingE948 Test Method for Electrical Performance of Photovol-taic Cells Using Reference Cells Under Simulated Sun-lightE973 Test Method for Determination of the Spectral Mis-match Parameter Between a Photovoltaic Device and aPhotovoltaic Reference CellE1036 Test Methods for Electrical Performance of Noncon-centrator Terrestrial Photovoltaic Modules and ArraysUsing Reference CellsE1040 Specification for Physical Characteristics of Noncon-centrator Terrestrial Photovoltaic Reference CellsE1125 Test Method for Calibration of Primary Non-Concentrator Terrestrial Photovoltaic Reference Cells Us-ing a Tabular SpectrumE1362 Test Method for Calibration of Non-ConcentratorPhotovoltaic Secondary Reference CellsE2527 Test Method for Electrical Performance of Concen-trator Terrestrial Photovoltaic Modules and Systems Un-der Natural Sunlight1This test method is under the jurisdiction of ASTM Committee E44 on Solar,Geothermal and OtherAlternative Energy Sources,and is the direct responsibility ofSubcommittee E44.09 on Photovoltaic Electric Power Conversion.Current edition approved Sept.1,2013.Published September 2013.Originallyapproved in 2011.Last previous edition approved in 2011 as E2848-111.DOI:10.1520/E2848-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 G138 Test Method for Calibration of a SpectroradiometerUsing a Standard Source of IrradianceG167 Test Method for Calibration of a Pyranometer Using aPyrheliometerG173 Tables for Reference Solar Spectral Irradiances:DirectNormal and Hemispherical on 37 Tilted SurfaceG183 Practice for Field Use of Pyranometers,Pyrheliom-eters and UV Radiometers2.2 IEEE Standards:IEEE 1526-2003 Recommended Practice for Testing thePerformance of Stand-Alone Photovoltaic SystemsIEEE 1547-2003 Standard for Interconnecting DistributedResources with Electric Power Systems2.3 International Standards Organization Standards:ISO/IEC Guide 98-1:2009 Uncertaint