Bluetti AC200P Grounding

[DsvidCarlson659]

So far I have purchased 3 AC200P and 1 EP500-Pro. I have 2 AC200P Connected to a Manual Transfer Switch which have a Good Neutral & Ground. When I turn the 2 AC200P on they show that they are Grounded with my tester. My EP500-Pro shows Grounded because it is connected to the AC Grid. The other AC200P is not connected to any Neutral or Ground and accordingly does not show Grounded. I created a Short Extension Cord with a Male Plug at each end and has only the Neutral & Ground wire connected. There is No Hot connected on that cable. That would be a Suicide cable as they call it. If I plug one end of that cable to the wall outlet and the other end to AC200P, will that establish a sufficient Ground. It seems to me that it would act the same as being connected to the Transfer Switch. See Photos Below. I hope you are able to understand this. I am an engineer and sometimes think outside of the box. I really need to know if my created cable is going to work and Ground my Bluetti.

 

[DsvidCarlson659]

Since I have received no Reply to my posed questions, I decided to try my Grounding Only Cable to see if it would work . . . The YouTube Link is below so you can see the results.