Good Day

I have a damaged 200 W solar panel from a customer.

I have attached a picture, can anyone advise what the cause of the damage might have been?

 

 

 

 

 

I could be wrong but it looks as if some of the diodes have blown. 
I made this mistake once a long time ago (when I was still young and stupid) by connecting a solar panel directly to a battery with no charge controller.

Maybe the customer made the same mistake. 🤔

3 hours ago, Solaris said:

I could be wrong but it looks as if some of the diodes have blown. 
I made this mistake once a long time ago (when I was still young and stupid) by connecting a solar panel directly to a battery with no charge controller.

Maybe the customer made the same mistake. 🤔

Thank You Sir. I suspected the same but wanted to get a neutral opinion.

9 hours ago, Solaris said:

I could be wrong but it looks as if some of the diodes have blown. 
I made this mistake once a long time ago (when I was still young and stupid) by connecting a solar panel directly to a battery with no charge controller.

Maybe the customer made the same mistake. 🤔

how do you tell that a diode has blown by just looking at a photo? All I can see is a bit of what looks like rust on the first two diodes. 

To check a diode one usually uses a multimeter. The resistance selection can be used and one should get a difference when the test leads are reversed. Often mutimeters have a semiconductor resistance selection option (indicated by a diode symbol). This will provide a higher voltage on the test leads to make the diode (or transistor) junction conduct better.

A diode normally will fail short circuit or open circuit.

On 2020/10/26 at 2:51 PM, Solaris said:

I could be wrong but it looks as if some of the diodes have blown. 
I made this mistake once a long time ago (when I was still young and stupid) by connecting a solar panel directly to a battery with no charge controller.

Maybe the customer made the same mistake. 🤔

Agreed