Enter the maximum power from the solar sell (W), the open circuit voltage (volts), and the short-circuit current (amps) into the Fill Factor Calculator. The calculator will evaluate the Fill Factor.

## Fill Factor Formula

The following formula is used to calculate the Fill Factor.

FF = P / (V*I)

Variables:

- FF is the Fill Factor ( )
- P is the maximum power from the solar sell (W)
- V is the open circuit voltage (volts)
- I is the short-circuit current (amps)

To calculate a fill factor, divide the maximum power of the solar sell by the product of the open circuit voltage and the short-circuit current.

## How to Calculate Fill Factor?

The following steps outline how to calculate the Fill Factor.

- First, determine the maximum power from the solar sell (W).
- Next, determine the open circuit voltage (volts).
- Next, determine the short-circuit current (amps).
- Next, gather the formula from above = FF = P / (V*I).
- Finally, calculate the Fill Factor.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

maximum power from the solar sell (W) = 30

open circuit voltage (volts) = 3

short-circuit current (amps) = 12FF = P / (V*I) =** ** ?