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Advice on flickering lights

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  • Advice on flickering lights

    Having problems with a new installation of a Magnum 4400W inverter making the LED lighting in this home flicker. I think its just an incompatibility with this particular lamp but the guy has got lots of them in the house and is wedded to their low power so doesn't want to try anything else. Running a high power appliance at the same time is no different. The inverter output looks fine on my o-scope. There is a long wire length from the inverter to the new subpanel. Battery bank is 8 Trojan L16's close to the inverter. All connections are tight. Any ideas???
    BSEE, R11, NABCEP, >1200kW installed

  • #2
    Originally posted by solarix View Post
    Having problems with a new installation of a Magnum 4400W inverter making the LED lighting in this home flicker. I think its just an incompatibility with this particular lamp but the guy has got lots of them in the house and is wedded to their low power so doesn't want to try anything else. Running a high power appliance at the same time is no different. The inverter output looks fine on my o-scope. There is a long wire length from the inverter to the new subpanel. Battery bank is 8 Trojan L16's close to the inverter. All connections are tight. Any ideas???
    are those lights on some sort of dimmer? Was it full on or somewhere in the middle? Do they all flicker or only particular room/circuit? How do you know this flickering relates to inverter, may be it was there before? For example, in my house I replaced bunch of incandescent bulbs with LEDs but left old dimmers in place. While in most rooms the dimmers work OK in one room where it has lighting fixture with 6 small candelabra bulbs replacing all 6 put related dimmer into some oscillation mode with 1-2 sec period as I assume it simply didn't have enough load anymore. Leaving 1 bulb out of 6 old incandescent type cured the problem.

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    • #3
      The LED's are not on a dimmer and they all do it. About a dozen lamps all together. They don't flicker when the inverter is on bypass to grid power.
      BSEE, R11, NABCEP, >1200kW installed

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      • #4
        Originally posted by solarix View Post
        The LED's are not on a dimmer and they all do it. About a dozen lamps all together. They don't flicker when the inverter is on bypass to grid power.
        any chance you can connect your scope instead of one of them? Does your scope have at least 1 MHz bandwidth? What I'm thinking is inverter creates some kind of high frequency noise which freaks these bulbs power supplies somehow. Or if you could take one of those bulbs and connect directly to the inverter output- would it flicker? Just trying to localize the problem and I understand you might not have luxury to do these tests.
        Last edited by max2k; 08-08-2017, 03:16 AM.

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