Jon, Do you recall which PV connectors were on the modules and what they used for extension cables?
Around that time, Amphenol H4 connectors had issues due to the plastic housings failing and allowing water into the connections. Bryan Norkunas PV-Cables Inc. 989 Milton Ave Ste 1D Ferndale CA 95536 (707) 923-3000 office www.pv-cables.com<http://www.pv-cables.com/> [cid:aa320544-f89d-44fc-a3e9-bb468c2d9953] [cid:867e1cba-ab13-4a98-9ecf-200189c32b6d] Please print only if necessary. NOTE: This email message and any attachments are for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by replying to this email, and destroy all copies of the original message. ________________________________ From: RE-wrenches <[email protected]> on behalf of Jon Dixon via RE-wrenches <[email protected]> Sent: Wednesday, October 23, 2024 9:07 AM To: [email protected] <[email protected]> Cc: Jon Dixon <[email protected]> Subject: [RE-wrenches] Module snail trails Hello All, I have a local utility with a 50Kw array installed in 2015 consisting of 200 ReneSola 250w modules and 3 SMA Tripower 15000TL-US -10. They are having Arc fault code on two of the inverters. This has been going on for a few years now. It happens a couple times a year generally after a large rain. They just reset the code and it comes back to life. They gave me a walk through and we noticed that a number of modules have snail trails. I have attached a closeup picture I took and IR views of affected module and non affected. It was a 90 deg day when the utility took the IR pictures. Causes for snail trails that I found: * The difference in chemical properties of EVA foils and the silver contacts * The degradation extent of the EVA material * Water vapor permeability of the solar panel’s backsheet material I did find that if you have snail trails you will have micro fractures. I did see some info that micro fractures could cause arc faults. Finally my question is can snail trails cause arc faults also? Thanks Jon -- Jonathan Dixon Dixon Power Systems 3250 N 20th St Ste 1 Lincoln, NE 68521 402-467-3240 [email protected]<mailto:[email protected]>
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