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  • Post in thread: sunnyboy SB7.7 -1Sp-US-41 error 6404

    Dear Members: I could really use some assistance, I do not know what else to do at this point, I cannot find my problem, and am so far getting no where's with sunnyboy tech support. I have not heard from them since Thursday morning. Sept 28th. I wrote them on the 29th with no reply. My Inverter...
  • Post in thread: sunnyboy SB7.7 -1Sp-US-41 error 6404

    Thank you. It fails early in the morning when there is barely any sunshine and in the 60's Fahrenheit. Inverter Type: Grid-Tie String Inverter Maximum/Peak Efficiency [%]: 208V:97.1% / 240V:97.5% CEC weighted efficiency @ 240V [%]: 97 Transformer / Transformerless: Transformerless DC Power...
  • Post in thread: sunnyboy SB7.7 -1Sp-US-41 error 6404

    I should have also stated, I haven't been able to get the system online at anytime of day for a week straight now.
  • Post in thread: sunnyboy SB7.7 -1Sp-US-41 error 6404

    Wow, yeagh that would be very simple to do. I dunno why I didn't think of it. I kept thinking i needed 3 strings,but i don't. . Thank you
  • Post in thread: sunnyboy SB7.7 -1Sp-US-41 error 6404

    Thank you, but how can a solar panel/string put out to much current? Also I disconnected all strings and tried running on single strings to no avail.
  • Post in thread: sunnyboy SB7.7 -1Sp-US-41 error 6404

    Thanks, it is confusing, and i may be reading it wrong. Sunnyboy combines 3 strings onto 2 mppt inputs. Then i have a separate string on the final 3rd input. My panels are rated at 8.3amp output. So three of those strings in parralel give 24.9 amps, but then divided over 2 inputs that gives...
  • Post in thread: sunnyboy SB7.7 -1Sp-US-41 error 6404

    Kommando: Thank you for the assistance and I apologize for my slow reply. I had ceilings coming down in 2 rooms from to much rain recently. That and over time has had me very busy. SMA sunnyboy finally got back to me and shipped me a new inverter a few days ago Thursday. I installed it, and the...

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