Enter the total power delivered by the sun to the area of the solar panel and the total power generated by the solar panel to determine the solar panel efficiency.

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## Solar Panel Efficiency Formula

The following formula is used to calculate the efficiency of a solar panel:

E = Pout/Pin * 100

- Where E is the solar panel efficiency
- Pout is the output power of the solar panel
- Pin is the total power delivered by the sun to the area of the solar panel or cell

## Solar Panel Efficiency Definition

**What is a solar panel efficiency? **

Solar panel efficiency is the percentage of the total power delivered by the sun to the area of a solar panel that it can then convert into electrical power.

**What is the average solar panel efficiency? **

The average solar panel efficiency is between 12-16%.

## Example Problem

How to calculate solar panel efficiency?

**First, determine the total power delivered to the area of the solar panel.**For this example, we will use a simple value of 400 watts.

**Next, determine the total power output by the solar panel.**In this case, the solar panel is able to generate 30 watts of power from the 400 watts of power delivered by the sun.

**Finally, calculate the efficiency of the solar panel.**Using the formula above, the solar panel efficiency is calculated to be:

E = Pout/Pin * 100

E = 30/400 * 100

E = 7.5%