Evidence that solar cells crack when you walk or kneel on them

This video shows that silicon solar cells are easy to break. But when they’re packaged in the module, it can be impossible to see this damage.


After a cell is cracked, the effect on the solar panel’s power output becomes worse and worse over the years.

Temperature changes associated with day and night cause thermal expansions and contractions that help pull apart the materials around the crack.

The video is made by running current backwards through the solar panel, so that the solar cells light up, like an LED.

The color of light that the solar cells emit is infrared (invisible to the eye), so the video is made using a special camera.



  1. I am a bit confused by this report. How does this relate to the flex test that PV modules undergo when they are tested to IEC standard 61215?

    1. @Gordon Howell: That’s a very interesting question for NREL. A quick search indicates that the latest information on module testing by NREL is dated 2013. Since this is new information, my guess is that an updated document might be released soon … hopefully.

Leave a Reply

Your email address will not be published. Required fields are marked *

What to Read Next:

The More You Know: European Union’s race towards renewables

The share of energy from renewable sources in the European Union (EU) is 16 percent. To achieve this, EU countries...

SolarGaps—the worlds first solar smart blinds for windows

According to information on the company's website, SolarGaps are smart blinds that automatically track the sun and generate electricity from...

Community Solar: Lots of Buzz, but Where’s the Action?

What is Community Solar? Recent years have seen an increase in community solar and shared renewable policies. So far, 14...

This Week’s Trending Solar News—June 22nd, 2017

BBC NEWS Donald Trump talks up solar panel plan for Mexico wall Trump has told supporters that his proposed wall...

China now leads the world in solar power production

The BBC profiles a number of graduates and entrepreneurs who have headed to China from the US to seek careers...