Electronic – My inverter keeps flipping between battery/mains slowly at first, then faster. Why

capacitorinverterrelayrepair

Here's the situation.

  • I'm possessed of an inverter purchased nearly a decade ago.
  • A few months ago it started to make a clicking noise of it's own volition
  • The repairman said he replaced the relay and then it worked fine … until now
  • By trial-and-error I discovered that enabling the bypass switch (so the inverter is powered from the battery) would kill the tripping. Killing the bypass brought up the tripping again.
  • More importantly, the longer the duration the bypass was enabled, the longer the wait before it would start to trip again; slowly at first and picking up speed with each cycle.
  • The repairman who fixed it originally and the other ones I've contacted are not bothered and recommend replacing the inverter altogether!
  • I have some basic exposure to electronics; my impression is that the relay is good but there is some condensor out of the kilter.

The idea of replacing the inverter merely because it flips isn't fun, and stinks of an attempt to earn some commission on the sale. I'll replace if I must, but not without giving it a try myself!

What I would like to know from you

  • Does my impression about the condensor sound right?
  • How should I go about finding out the fault?

Best Answer

I seems your invertor is detecting a false brown out condition (low Vac) or a DC reference voltage is too high inside.