How do I replace a panel?

[gary24680]

I am not sure where to ask this. I have a 10KW array. a few of the panels have some of the discs very discolored (brown color ). I am competent to work on electrical. How do I get replacement panels. I assume I can swap them out after the sun goes down. the panels are Sunpower SPR-215-BLK-U 215W 39.8V 5.4A ground mount

[DanS26]

The brown spots may or may not indicate a production problem. Google "snail trails". Have you tested the output of the problem panels? Since it is a ground mount you can test the panel output without dismounting. A small solar charge controller and a 12v battery can be used to determine if a panel is actually producing amp power even if the voltage is fine. Again Google is your friend to find out how to do this.

You did say you were "competent to work on electrical".