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Nominal voltage of solar panel?

DeeDee

New Member
Joined
Jun 26, 2021
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3
I have a single 330W flex solar panel with 98 cells rated at 67VOC. How do I determine the nominal voltage of that panel?

Is it 24, 36, 48V? Trying to determine wire gauge for a 100ft circuit (50' each way) on this panel going to a Victron MPPT rated 100/30. Changing the voltage in various online calculators changes the gauge of the wire. Not sure how to properly assess.

VOC 67
ISC 6.7
Pmax 330W
Vmp 57V
Imp 5.7A
 
12/24/36/48V, etc. are the NOMINAL voltages of the panels and are not useful in computing voltage drop.

Per @Bob142 's direction, use Vmp and Imp for voltage and current. In the calculator you linked, 57V and 5.7A are the numbers to use.
 
So VMP is the place to start - not nominal. Thank you very much. It certainly makes a huge difference in the outcome.
 
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