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  • FIRST POST
    • Sterlingtimes
    • By Sterlingtimes 3rd Aug 18, 4:43 PM
    • 1,550Posts
    • 3,924Thanks
    Sterlingtimes
    What happens if a microinverter fails?
    • #1
    • 3rd Aug 18, 4:43 PM
    What happens if a microinverter fails? 3rd Aug 18 at 4:43 PM
    It hasn't happened yet. If a microinverter or its associated panel were to fail, would it always fail so as to be open-circuit, i.e. could the faulty components just be left on the roof forever? Losing one out of 14 may not be catastrophic: there would just be less generation.
    Solar installed 21 November 2014 > Centre of England > 3,780 Wp > 14 *270 Watt Trina panels > 14 * Enphase micro-inverters > managed by Enlighten Envoy Hub > 19 west of south > 35 pitch > tree shading to east > iBoost > Wattson Anywhere monitoring > Ovo Smart Gateway > Schneider Electric (Drayton) MiGenie smart thermostat.
Page 1
    • pinnks
    • By pinnks 3rd Aug 18, 5:00 PM
    • 645 Posts
    • 1,397 Thanks
    pinnks
    • #2
    • 3rd Aug 18, 5:00 PM
    • #2
    • 3rd Aug 18, 5:00 PM
    Good question. Aren't microinverters still in a string, i.e. in series, whereas SE are in parallel? If so it would seem likely that the system would go open-circuit and fail.

    I am sure one the gurus will know.
    Wiltshire - 5.25kWp
    3.5kWp: 14 x Phono Solar 250 Onyx, Sunny Boy 4000TL, WSW 40 degrees, June 2013
    1.75kWp: 7 x Phono Solar 250 Onyx, Sunny Boy 1600TL, SSE 45 degrees, March 2014
    • gefnew
    • By gefnew 3rd Aug 18, 5:45 PM
    • 126 Posts
    • 136 Thanks
    gefnew
    • #3
    • 3rd Aug 18, 5:45 PM
    • #3
    • 3rd Aug 18, 5:45 PM
    Hi sterlingtimes
    Because they function independently, microinverters are inherently more reliable:
    there's no single point of failure in a microinverter system. Plus, we're obsessive about quality, and our products reflect that.
    • If one panel goes down, the others won't go down with it.
    • Enphase microinverters undergo the most rigorous product testing in the industry.
    • regards
    • gefnew
    • Sterlingtimes
    • By Sterlingtimes 4th Aug 18, 8:31 AM
    • 1,550 Posts
    • 3,924 Thanks
    Sterlingtimes
    • #4
    • 4th Aug 18, 8:31 AM
    • #4
    • 4th Aug 18, 8:31 AM
    Thank you, gefnew, That is exactly what I wanted to know. So in the event of a failure, I might just decide to leave tyyhe broken components alone and let the remainder continue.
    Solar installed 21 November 2014 > Centre of England > 3,780 Wp > 14 *270 Watt Trina panels > 14 * Enphase micro-inverters > managed by Enlighten Envoy Hub > 19 west of south > 35 pitch > tree shading to east > iBoost > Wattson Anywhere monitoring > Ovo Smart Gateway > Schneider Electric (Drayton) MiGenie smart thermostat.
    • Heedtheadvice
    • By Heedtheadvice 12th Aug 18, 10:29 PM
    • 956 Posts
    • 475 Thanks
    Heedtheadvice
    • #5
    • 12th Aug 18, 10:29 PM
    • #5
    • 12th Aug 18, 10:29 PM
    So Enphase are obsessive about quality znd rigerous testing.
    Not sure if the OP's inverters are Enphase?


    To support the information that there is no singke point of failure perhaps info on failure mode analysis conducted would clarify what is most likely in terms of a failure?


    Not only that the 'failure' might be nothing to do with the inverter failing such as it could be a cable fault (e.g. rodent damage) or water ingress or a whole host of ofher reasons......
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