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Max Voc and Min Vmp Calculator

*This calculator is a quick reference. It’s not intended as a replacement for AS5033

Australian Standard AS5033 Clause 3.1 States The Following:

“PV arrays for installation on domestic dwellings shall not have PV array maximum voltages greater than 600V. For non-domestic installations where the PV array maximum voltage exceeds 600V, the entire PV array and associated wiring and protection shall have restricted access.”

Calculate Max Open Circuit Voltage of a String
(Voc corrected to the lowest expected site temperature)

VOCMax = VOCModule x M + ϒVoc(Tmin – TSTC)M

Panel Voc at STC:
 
? The value must be betweeen 10 to 50 (inclusive) and must be positive

Panel’s temperature coefficient of Voc:
(Please enter as a positive %. For example -0.28% will be entered as 0.28)
 
? The value must be betweeen 0 to 2 (inclusive) and must be positive

Minimum Temperature expected at the site, in deg Celcius:
 
? The value must be betweeen -40 to 20 (inclusive)

How many Solar Panels in a string?
 
? The value must be greater than 0

Maximum voltage of the string, (Voc) at lowest expected site temp =
0.00 Volts
*Assuming Panels will be mounted parallel to the roof.

Calculate Min Voltage of a String
(Vmp corrected to the highest expected site temperature)

VmpMin = VOCModule x M + ϒPmp(Tcell – TSTC)M

Panel Vmp at STC:
 
? The value must be betweeen 10 to 50 (inclusive) and must be positive

Panel’s temperature coefficient of Vmp:
(Please enter as a positive %. For example -0.28% will be entered as 0.28)
 
? The value must be betweeen 0 to 2 (inclusive) and must be positive

Maximum Temperature expected at the site, in deg Celcius:
 
? The value must be betweeen 5 to 85 (inclusive)

How many Solar Panels in a string?
 
? The value must be greater than 0

Minimum voltage of the string, (Vmp) at highest expected site temp =
0.00 Volts
*Assuming Panels will be mounted parallel to the roof.