Finding Max Current Of Solar Panel

Hi guys here is the new video from my channel how to check amperes and voltages of solar panels 300 watts solar panel from electrical and electronics.

Finding max current of solar panel.

Solar panels have been consistently increasing in efficiency at about 5 annually since 2010. Solar panel voc at stc. This is the highest current the solar panels will produce under standard test conditions. Under stc a 250 watt panel produces 250 watts of electricity when the sunlight or solar irradiance on the panel is 1000 watts per square meter and the panel is operating at 25 c.

As you can see for low currents the voltage varies slightly and for low voltages the current is almost constant. The program retrieves the current date and time from your computer and fills in these values in the date time fields. Hit the calculate solar position button. So you will have the maximum current when the panel is short circuited and the maximum voltage when the panel is open circuited.

The average efficiency of solar panels falls between the 17 to 19 percent efficiency range. The solar panel has a v i curve which is shaped like this. As can be seen from table 1 and figure 2 that the open circuit voltage is zero when the cell is producing maximum current i sc 0 65 a. This is the open circuit voltage the solar panel will produce at stc or standard test conditions 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.

To perform calculations for a different date simply select the month in the pulldown box and enter the day and four digit year in the appropriate input boxes. For the sake of example if you are getting 5 hours of direct sunlight per day in a sunny state like california you can calculate your solar panel output this way. Short circuit current is the maximum current produced by the solar cell it is measured in ampere a or milli ampere ma. This information can be found from the solar panel manufacturers data sheet please see example here.

5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh. Factors that affect solar panel efficiency. All manufacturers must produce panels that meet or surpass their advertised wattage under stc.