Open Voltage Solar Panel

You would expect to see this number listed on a pv module s specification sheet and sticker.

Open voltage solar panel. Since the solar panel isn t connected to anything there is no load on it and it is producing no current. Consult your solar panel s documentation for information or contact our technical support desk. Open circuit voltage voc open circuit voltage is how many volts the solar panel outputs with no load on it. Solar panel output is expressed in units of watts w and represents the panel s theoretical power production under ideal sunlight and temperature conditions.

The open circuit voltage corresponds to the amount of forward bias on the solar cell due to the bias of the solar cell junction with the light generated current. Some exceptions may apply based on panel type. The open circuit voltage voc is the maximum voltage available from a solar cell and this occurs at zero current. Measuring voltage and solar panel testing voltage at open circuit voc this is the voltage that is read with a voltmeter or multimeter when the module is not connected to any load.

Stc conditions are the electrical characteristics of the solar panel at airmass of am1 5 irradiance of 1000w m 2 and cell temperature of 25 o c. Open circuit voltage can vary depending on your solar panel but the readings we are usually looking for are in the range of 15 to 23v. Most home solar panels on the market today have power output ratings ranging from 250 to 400 watts with higher power ratings generally considered preferable to lower power ratings. Solar panel voc at stc.