100 watt solar panels

DConlyGuyDConlyGuy Registered Users Posts: 80 ✭✭
3 of the 4 panels i have have these lines in them, they seem to be working like always but i wondering iof these are all defective or not3 of 
600 watts of solar panels,Epever 30 mppt , 2 PWHR12500W4FR battery's in 24 volt setup

Comments

  • BB.BB. Super Moderators, Administrators Posts: 30,055 admin
    You can search for the term "snail trail" -- Generally not a problem (as far as I know):

    http://www.onlinetes.com/article/tes0512-solar-industry-snail-trail/

    If you see physical cracks/browning--Those are failing (ed) cells and would need the panel replaced.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • DConlyGuyDConlyGuy Registered Users Posts: 80 ✭✭
    thanks bill i was reading a post over on other forum and sunking said it was junk, so i just wanted to make sure.  i did test them all and all of them were putting out 20 volts each. it seems to be happening to a lot  of the 100 watt panels, my renogy panel does not have them yet, but it ia 6 months newer than the others so ill wait and see if they develope them too
    600 watts of solar panels,Epever 30 mppt , 2 PWHR12500W4FR battery's in 24 volt setup
  • BB.BB. Super Moderators, Administrators Posts: 30,055 admin
    You have to check/monitor Isc/Imp too... Voltage only check is not good enough to catch poor/broken electrical connections/cells.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • DConlyGuyDConlyGuy Registered Users Posts: 80 ✭✭
    they hit 20 amps today in bulk that is what they have been hitting for last year ive had them 
    600 watts of solar panels,Epever 30 mppt , 2 PWHR12500W4FR battery's in 24 volt setup
  • mike95490mike95490 Solar Expert Posts: 8,614 ✭✭✭✭✭
    snail trails are wavy lines, those have lots of straight components that look like cracking.  I think they are going to fail you come a couple hot days and they start getting brown edges
    Powerfab top of pole PV mount | 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

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