whjohnson: 
 

Then the obvious thing to do would be to connect a multimeter between the earth terminal and the rest of the assembly.

Been there, done that with the original version.

I would really like them to have said they are double insulated with a parking terminal for the CPCs, it would make it a much more versatile product.

Then they changed the drivers and introduced this one with an earth terminal, but then did not connect it.

whjohnson: 
 

Then the obvious thing to do would be to connect a multimeter between the earth terminal and the rest of the assembly.

Been there, done that with the original version.

I would really like them to have said they are double insulated with a parking terminal for the CPCs, it would make it a much more versatile product.

Then they changed the drivers and introduced this one with an earth terminal, but then did not connect it.