Burn Marks On Solar Panels

About half of the panels appear to have burn marks of an unknown origin.

Burn marks on solar panels.

When you examine the terminal you will more than likely find signs of oxidation. Just like a car battery solar panel system battery terminals can burn out. You will need to replace all metal parts in the terminal. Typically they are in the same exact place on multiple solar panels.

When you use a charge controller that is what it is doing anytime the battery bank is full tapering off the. As a result the voltage can rise which leads to a hotspot in the soldered points and or a cell. These have been seen on panels manufactured by smaller suppliers and large distributors alike. Mark having solar panels in the sun without a load on them should not damage them.

If you work in the solar panel installation business long enough you ll inevitably come across solar panels with strange brown spots. This is a sign of a burnt terminal. This is because a pv solar panel is made up of a string of individual solar cells connected in series with one another. Hotspots on panels are mainly caused by badly soldered connections or are a result of a structural defect in the solar cells.

A burnt terminal can be cause by wiring too many panels to one terminal.