Quattrohead
Solar Wizard
Yes those are the via's. The reason the mounting holes are not through plated is because the hole would fill with solder in the bath.Is this what you mean?
View attachment 79971
If the smaller holes are through plated, then the metal the screw threads into to make contact needs to be physically separated from the board.
Is there a gap between the board and the metal the screw goes into?
There is NO GAP between the board and the metal post the screw goes into. Without the screw the connection may or may not be made.
Hence why I commented on Ian's video that I do not like the screw removal method, it is not reliable. The wire link (JP2) needs to be cut.
I don't know if Growatt or MPP have this same arrangement, this is just what I found on my knock off unit that has blown up.