# Calculating Efficiency of a Solar Cell Indirectly

Not sure if this is the right section for this, I apologize in advance.

I have a project to do and my goal is to measure the efficiency of a solar cell INDIRECTLY. I am not sure how to do that.

The equation for the efficiency of a solar cell is

η = P/E*A.

Where P is the cells power output (W), E is the irradiance (W/m^2) and A is the surface area of the cell (m^2).

The only thing I can think of is using a pyranometer to measure irradiance, and digital multimeter to measure power, but these aren’t really indirect.

Can someone please help?

Thanks.

http://ift.tt/1remCdJ

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