BS EN 61829:2016 specifies procedures for on-site measurement of flat-plate
photovoltaic (PV) array characteristics, the accompanying meteorological conditions, and use
of these for translating to standard test conditions (STC) or other selected conditions.Measurements of PV array current-voltage (I-V) characteristics under actual on-site conditions
and their translation to reference test conditions (RTC) can provide:data for power rating or capacity testing;verification of installed array power performance relative to design specifications;detection of possible differences between on-site module characteristics and laboratory or
factory measurements;detection of possible performance degradation of modules and arrays with respect to onsite
initial data;detection of possible module or array failures or poor performance.For a particular module, on-site measurements translated to STC can be directly compared
with results previously obtained in a laboratory or factory for that module. Corrections for
differences in the spectral or spatial response of the reference devices may need to be
assessed as specified in IEC 60904.On-site array measurements are affected by diode, cable, and mismatch losses, soiling and
shading, degradation due to aging, and other uncontrolled effects. Therefore, they are not
expected to be equal to the product of the number of modules and the respective module
data.If a PV array is formed with sub-arrays of different tilt, orientation, technology, or electrical
configuration, the procedure specified in this International Standard is applied to each unique
PV sub-array of interest.Cross References:IEC 60891EN 60891IEC 60904-1EN 60904-1IEC 60904-2EN 60904-2IEC 60904-3EN 60904-3IEC 60904-4EN 60904-4IEC 60904-7EN 60904-7IEC 60904-10EN 60904-10IEC 60904-5EN 60904-5IEC 61853-1:2011EN 61853-1:2011ISO/IEC 17025EN ISO/IEC 17025All current amendments available at time of purchase are included with the purchase of this document.