METREL MI3115 - Page 74

MI 3115 PV Analyser
Appendix D - PV measurements - calculated values
74




 

Equation
symbol
Instrument
abbreviation
Description


Umpp (STC)
Maximum power point voltage calculated to STC
values


Impp (STC)
Maximum power point current calculated to STC
values


Pmpp (STC)
Maximum power calculated to STC values
Relative errors are calculated as follows:






 




 


󰇧


 



󰇨  


󰇧


 



󰇨  


󰇧


 



󰇨  


󰇧


 



󰇨  





 



 

 





 



 

 
Equation
symbol
Instrument
abbreviation
Description


Uoc (NOM)
Nominal open-circuit voltage


Uoc (STC)
Open-circuit voltage calculated to STC values


Isc (NOM)
Nominal short-circuit current


Isc (STC)
Short-circuit current calculated to STC values


Umpp (NOM)
Nominal maximum power point voltage