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Help with assessing used panels and sizing inverter.

Callipygous

New Member
Joined
Jun 16, 2024
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2
Location
california
I have access to 24 Shuco mpe180 ms 05 panels for free. They are used, about 15 years old. I have always wanted to put solar on my house, but it didn't fit the budget. I am trying to work out if these are usable, safe, and worth the effort and cost of a new inverter.
Several of them have cracks, and I am wondering if they are a safety issue, or will cause problems with performance. as seen here:
solar cracks.jpg

Is there a way I can test the integrity of each panel?
I know they are expected to degrade over time, is there a good way to check the actual output of each panel so I can size an inverter to the system I actually have?
I had the impression that there were features/technological compatibility issues between different inverters and panels, but in my digging around all I've really found is information on how to size an inverter to the output of the panels. Are there any other compatibility concerns I should take into account when selecting an inverter for these?

Thanks in advance!
 
You will need a tool to test each one.

Something like this will work: https://www.amazon.com/gp/product/B0C7TQV99W/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

If the panels have cracked glass, it's advisable not to use them. Cracks can allow moisture to get inside, potentially causing shorts and even fires. While some people attempt to repair cracked panels with transparent sealants, these repairs are often incomplete, and it's unclear whether the materials used might reduce light transmission or increase heat, both of which would decrease the panel's performance.
 
The plastic backing can crack on older panels and may cause problems.
I would use them as a casual experiment but you won't be able to have an inspected install with them.
 
Based on the description I would suggest passing them by. If you lived in a remote area, without need to please anyone but yourself, they could be an experimental setup so long as you understood that that "free" may mean "worthless".
 
Perhaps its worth mentioning that I know they at least worked at the time of their removal, its not like i just found a pile of potentially dead panels at the side of the road. They came off my parents house because they were upgrading to more efficient ones. I'm kinda wondering if the cracks are the result of careless removal by someone who assumed they were just being thrown away.
Regardless, the sentiment seems pretty unanimous that they are more risk than they are worth.

Thanks
 

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