ofar81

Thank you very much for your answers. Finally someone know what they are talking about and gives me a scientific explanation. Since after asking around, it seemed like this is an issue not unique to me, but still I was very curious to understand why it happens. On other forums, the only answers I got were: oh, no that is not normal. Or: oh, this is the first time anyone has described such behavior from an inverter. Or: pls send me the serial number of your inverter so we can contact the manufacturer and report this defective inverter. Even the manufacturer, who I emailed, asked me to send the serial number of my inverter and a video showing my multimeter readings and they will look into it. To tell you the truth, it is really annoying that so many people reply to posts on forums, yet they really don't know anything. I mean, some of the above mentioned replies were from users who had hundreds of posts on forums dedicated to discussing solar installations and inverters..etc... Anyways, thank you very much.

Hi. I have a Deye SUN-8K-SG01LP1 EU. It is working as it should. However, I have noticed something strange. When the inverter is on, even if PV is disconnected, there is a voltage detected at the PV IN terminals (equal voltage of about 130v AC on all PV input terminals (both - and + PV input). The voltage causes a test screw driver to light up (showing there is significant AC voltage present) and by a multimeter I measured 130V AC between the PV IN terminals and ground. Is this normal? If so, wouldn't this be bad for the solar panels? I mean there is an AC voltage being applied to the panels. Also isn't this a safety concern? Doesn't this cause a risk of an AC current back flowing from the inverter to the panels and into ground? I would appreciate if you could explain to me why I am observing this. Note: I also asked some others with installed inverters (both Deye and Growatt) and they tested their inverters and had the same behavior! A friend told me he actually got a nasty electric shock when he touched the PV IN terminal (with no PV connected, so the electricity was coming from the inverter). I would really appreciate any ideas as to why inverters do that. Thank you.