Further Instructions
If you are having difficulty with the String Sizing Program, or it is not operating properly, see this Read Me file for the operating instructions and version history of the String Sizing Program.

By using this String Sizing Program you agree that this Program is for approximating PV module string sizes only. Further you agree that SMA America, Inc. makes no claim as to the actual performance of your system, including, but not limited to, the efficiency or power production of the inverter and PV modules based on the information from this Program. Additionally, you agree that it is the responsibility of the system design engineer to ensure that the PV module selection, array configuration, and associated wiring diagrams are appropriate for the system being considered.

NOTE:
For an explanation of any particular entry definition click on the actual term for a glossary.
 
Design Options

Please Select an Inverter
Please Select a PV Manufacturer
Please Select a PV Module


   
 
Inverter Data

Design Irradiance (W/m2)
Pgac
Pdcmax


Idc Max Vdc Max **** Vmpt Max Vmpt Min Vmin


 
Module Data

Module Pnom (W)
Voc (V)
Vmp (V)
Isc (A)
Imp (A)



Temperature Coefficient of Voltage Temperature Coefficient of Current Temperature Coefficient of Power



 
Mounting Method

Please select the mounting method for the array:

 
Temperature Data

If you do not know the hottest and coldest ambient temperatures that you should select for your area please enter the 5-digit postal ZIP code of the address of the installation here:  and then


Select the coldest record low ambient temperature when sunlight will be on the array
Select the hottest average high ambient temperature when sunlight will be on the array		 Imperial units

 Metric units






 
Results

1 string
configurations
2 string
configurations
3 string
configurations
4 string
configurations
5 string
configurations
 






 

* Some derating possible
** Some derating likely with out
adequate air flow
*** Install a Sunny Breeze Kit to
prevent derating
**** PV Array voltage may exceed 600 Vdc, please refer to NEC table 690.7 to calculate open circuit voltage at low temperature