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Blown Inverters...

Discussion in 'Troubleshooting and Repair' started by rionzion, Mar 30, 2011.

  1. rionzion

    rionzion

    9
    0
    Mar 30, 2011
    Hi all...

    I use a 12vdc to 230v ac inverter with an off-grid setup consisting of a 12v battery bank, a solar panel and a generator.

    i have blown several inverters by forgetting to unplug the inverter before running the genrator, i.e the inverter has had 230v ac fed INTO it via its "outlet"plug - the wrong way!

    in each case the inverter will power up but the fault light remains illuminated. We're talking cheap "modified sine wave" units around 300-500w in size.

    can anyone tell me which component(s) are likely to have failed and whether it would be possible/worthwhile to try and fix them? Or should i just use the boxes for other projects?!

    Many thanks for any help.
     
  2. Resqueline

    Resqueline

    2,848
    1
    Jul 31, 2009
    Most likely the output power transistors are blown, having taken their drive circuits with them "in the fall".
    A repair is possible but likely somewhat elaborate & expensive, and the outcome is still not always successfull.
     
  3. rob_croxford

    rob_croxford

    262
    0
    Aug 3, 2010
    Do your inverters use IGBT modules?? If so its quite possible these have been seriously damaged and would be a costly repair.

    The driver would be damaged and replacing one will be expensive - designing your own very costly and time consuming.

    sounds to me as if you inverters are beyond resonable repair
     
  4. MattyMatt

    MattyMatt

    154
    0
    Mar 24, 2011
    Probably not my most intelligent post... but isn't there a diode or a BANK of diodes you can use so this doesn't happen again? Having that happen more than once is probably not a fantastic thing at all.... there has to be some kind of protection circuitry you can put in line... right??
     
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