Hard to tell with low resolution but it looks like aluminum scrapes on the surface of the glass from mishandling panels and allowing the frames to slide over the surface of the glass when stacking or installing them.
BTW I have yet found a method of removing these. Have tried many cleaners, magic erasers, elbow grease etc.
The glass surface is smooth. I could not feel any scratch with my fingernail. I've also looked very careful when the panels were delivered for any damage. Nothing, it was packed in bubble wrap and card box. This must have occurred afterwards. I've noticed that the watts output dropped and investigate. After they were cleaned then I noticed these "cracks". Is it possible for a cell to disintegrate like this? (Added better photos)
That does look like it is in individual cells. I haven't seen this particular anomaly before. Others here should chime in soon and offer their knowledge.
I would use a non contact thermal meter to check those cells against others on a sunny day. I think you will find them a lot hotter,
confirming a break. If you have panels in series, check the voltage across each one under strong sun. A panel running at 1/3 or
2/3 voltage is bypassing a section. The controller needs to be an MPPT to make this measurement. Bruce Roe
I would use a non contact thermal meter to check those cells against others on a sunny day. I think you will find them a lot hotter,
confirming a break. If you have panels in series, check the voltage across each one under strong sun. A panel running at 1/3 or
2/3 voltage is bypassing a section. The controller needs to be an MPPT to make this measurement. Bruce Roe
Looks like you have a warranty claim to file. Looks like cracks. Amp reduction confirms cracks. Either panels were flexed, or the final heating-cooling lamination cycle was rushed at the mfg.
Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
Looks like you have a warranty claim to file. Looks like cracks. Amp reduction confirms cracks. Either panels were flexed, or the final heating-cooling lamination cycle was rushed at the mfg.
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