A-1
Appendix A. Glossary of Variable
Names
Variable Name
Description
RTU_Internal_Temp
Panel temperature of CR-PVS1, °C
RTU_Voltage
Battery voltage of CR-PVS1, VDC
Soiling_Loss_Index_Corrected
Soiling loss index with offset
correction applied, %
Soiling_Loss_Index_Raw
Soiling loss i
ndex without offset correction applied, %
Live_Index_Corrected
Real-time index of reference to test panel with offset correction applied,
%
Live_Index_Raw
Real-time index of reference to test
panel without offset correction applied, %
Stable_Data_Check
Variable indicating if environmental conditions are stable, True (–1)/False (0)
Time_Status
Variable indicating if the time of day is appropriate for performing soiling
loss index calculations
Geff_Status
Variable indicating if the measured effective irradiance is appropriate for
performing soiling loss index calculations
Isc_Status
Variable indicating if the measured short-circuit current is appropriate for
performing soiling loss index calculations
Temp_Status
Variable indicating if the measured back-of-panel temperature is appropriate
for performing soiling loss index calculations
IscTest
Short-circuit current of test panel, Amps
IscRef
Short-circuit current of reference panel, Amps
TempTest
Back-of-panel temperature of test panel, °C
TempRef
Back-of-panel temperature of reference panel, °C
GeffTest
Effective irradiance of test panel, W/m
2
GeffRef
Effective irradiance of reference panel, W/m
2
Offset_Geff
Measured offset between reference and test panels, %
Stable_Data_Count
Incrementally counts when conditions are appropriate for performing soiling
loss index
Update_Offset
Boolean variable that user triggers when the offset correction is to be
performed
UTC_Offset_UserEntered
User-entered UTC offset of site location, hours
Latitude_UserEntered
User-entered latitude of site location
Longitude_UserEntered
User-entered longitude of site location
AlphaTest_UserEntered
Published panel short circuit current (Isc) temperature coeffecient of the test
panel (if published in
units of %/
°C, then enter published value/100)
AlphaRef_UserEntered
Published panel short circuit current (Isc) temperature coeffecient of the
reference panel
(if published in units of %/
°C, then enter published
value/100)
IscTeststc_UserEntered
Published panel short-circuit current (Isc) of the test panel at STC
IscRefstc_UserEntered
Published panel short-circuit current (Isc) of the reference panel at STC
LocalSolarNoon
Solar noon of site location, as determined by user-entered site location data
