voltronic VM IV-4000 TWIN (weird voltage on its metal body)

Hi all,

I just purchased my first voltronic inverter i connected its A/C input from mains (L,N) without any earth even though the earth terminal is available on the inverter A/C input. because I don't have earthing in my house and i connected its A/C output (L,N) to my lighting. I noticed that when the inverter is in bypass mode (power comes from the Mains input) the electrical light screwdriver tester lights up when I put it on its metal body. but when I switch it to battery mode this phenomenon disappears.

PS: I am not sure if swaps L and N.

A/C is typically Air Conditioning
AC is alternating current.
DC is direct current.

You should connect the mains G to the unit's input rather than leaving it disconnected.

Typical normal behavior for inverters is to provide an N-G bond when inverting.

When fed by mains, the inverter releases it's N-G bond and relies on the N-G bond provided by the mains source. Since you have failed to connect the G from mains, you have a floating neutral relative to ground.

thanks

sunshine_eggo​

do you think this is the reason that the chassis is getting this weird voltage on its metal body? it cause shock when i touch it if AC in working (bypass mode)

what about inverter AC out ground should I tie it with AC in ground to the mains ground?

sniperhex said:

thanks

sunshine_eggo​

do you think this is the reason that the chassis is getting this weird voltage on its metal body? it cause shock when i touch it if AC in working (bypass mode)

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With no ground from the AC input, the Neutral is floating from ground. You will have voltage at L-G and N-G.

sniperhex said:

what about inverter AC out ground should I tie it with AC in ground to the mains ground?

Click to expand...

Before I answer, I would like to see a sketch of what you propose.

The load is just lighting and fridge ( through completely separate wiring from House wiring)