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diy solar

Giandel 1200W Open Ground

Sound reasonable?
Yes. That part is well understood.
Three-act pixie dances with ‘reversed’ H and G on transformerless inverters? Not so much.

Further reading this morning and I discovered that these transformerless inverters do this for two two reasons. Primary reason the way they use capacitors. Second is apparently inductive.

You actually explained this very well once, and I appreciate your input.

I recall testing things when I started this four years ago. I just don’t remember it was messed up… and in a way it is messed up because you potentially could energize the batt(-). The $250 transformer fixes the issue but then again High Freq inverter cost plus the transformer is about the cost of a lower-capacity transformer inverter, so… there you go.
 
where the heck is 58 & 59 volts coming from.
From two actions in the inverter where the wave form combines externally doubling the static output voltage. One is below zero on the oscilloscope wave, one is above; added together? 120V
This is common.

Smoothjoey probably has a better technical explanation.
 
So "Splain this one to me Lucy", where the heck is 58 & 59 volts coming from.
Since neither hot or neutral is bonded to ground, the measurements are relative to the local presentation of the universe.
That is what floating means.
If I'm wrong I'm sure someone will come along to thwack me in the ear.
 
Yes. That part is well understood.
Three-act pixie dances with ‘reversed’ H and G on transformerless inverters? Not so much.

Further reading this morning and I discovered that these transformerless inverters do this for two two reasons. Primary reason the way they use capacitors. Second is apparently inductive.

You actually explained this very well once, and I appreciate your input.

I recall testing things when I started this four years ago. I just don’t remember it was messed up… and in a way it is messed up because you potentially could energize the batt(-). The $250 transformer fixes the issue but then again High Freq inverter cost plus the transformer is about the cost of a lower-capacity transformer inverter, so… there you go.
Can you point me to the exact post.
My memory is really bad.
 
No.
No.

The three wires not being like household wiring which I erroneously expected.
Since it doesn't have support for hardwire I think it can be floating neutral and still be fit for purpose.
I also suspect the GFCI thing is a red herring.
 
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The 60v between legs to Ground is irrelevant.
Ground is not part of the circuit.
This is an automotive inverter.
Neutral is not bonded to ground, so any voltage readings to Ground dont count.
As long as the case is grounded to the vehicle, it is ok.

Inductive capacitance will create phantom meter readings.

If the inverter CAN be bonded to Ground, the phantom evaporates.

Some inverters cannot be bonded.
 
Some inverters will simply fail if bonded…
Its the failure modes I'm interested in.
Is this a magic smoke scenario?
Is there any danger?

I've not seen the magic smoke scenario here on the forum.
 
Yes. Magic smoke on a cheapo inverter.
Most pure sine wave inverters can handle being bonded.
But elcheapo made in china noname may not be capable of bonding.
 
Yes. Magic smoke on a cheapo inverter.
Most pure sine wave inverters can handle being bonded.
But elcheapo made in china noname may not be capable of bonding.
Is there a non-destructive test to determine if the inverter will survive?
 
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