What is Open Circuit Voltage?

What is  Open Circuit Voltage?

Open Circuit Voltage Definition

Open circuit voltage is defined as the voltage between two terminals when no external load is connected, also known as Thevenin Voltage.

No Current Flow

In an open circuit, no current flows because the circuit is not complete.

Finding Open Circuit Voltage

Measure the voltage across the open terminals to determine the open circuit voltage.

Solar Cells and Batteries

Open circuit voltage in solar cells and batteries depends on factors like temperature and state of charge.

I0 = Dark saturation current

IL = Light generated current

N = Ideality factor

T = Temperature

k = Boltzmann constant

q = Electronic charge

Testing with Multimeter

Use a digital multimeter to test open circuit voltage by measuring across the battery terminals without a load.