Good morning, everyone.
I accidentally noticed during some checks on the panel strings that I have about 185V AC coming out of the inverter. Basically, by measuring to ground with a tester (Fluke) on the PV input, I’m getting this voltage.
I got shocked even though nothing was connected, and that's how I noticed it.
When performing the same measurement on a Voltronic 8k Axpert inverter, I find 190V AC.
Is this normal? Has anyone else observed this?

1 hour ago, smsteves said:

Good morning, everyone.
I accidentally noticed during some checks on the panel strings that I have about 185V AC coming out of the inverter. Basically, by measuring to ground with a tester (Fluke) on the PV input, I’m getting this voltage.
I got shocked even though nothing was connected, and that's how I noticed it.
When performing the same measurement on a Voltronic 8k Axpert inverter, I find 190V AC.
Is this normal? Has anyone else observed this?

Yes this is normal on the over 145V models. That's why panels must be isolated when even working on them during the period after sunset. 

Really? But my DC string doesn’t exceed 120V, so why do I find 185V AC on the DC input? I can’t understand it. Is there a way to reduce/eliminate it?

On 2024/11/08 at 10:32 PM, smsteves said:

But my DC string doesn’t exceed 120V,

For all the 6 kW and 8 kW models that I'm familiar with, you'll need at least 4 panels in series; 120 V may not be enough for these models, at least to get started.

On 2024/11/08 at 10:32 PM, smsteves said:

why do I find 185V AC on the DC input?

It's just the way that they are designed. Almost every inverter capable of handling high PV voltage is like this. They buck the panel voltage and use that  as the DC bus voltage. The DC bus voltage can't be isolated from earth.

On 2024/11/08 at 10:32 PM, smsteves said:

Is there a way to reduce/eliminate it?

No.