That bench test was for the PM3 that does not have the 15 min feature. It used to say you got an initial flicker of 14.4 then it went steady 13.6ish. My PM3 did exactly that before I did the mod on it.
Getting 14.6 at first on bench test with the PM4 seems reasonable IMO especially if it drops to 13.6 after 15 minutes.
---IMO there is no way a 75 amper will have only two 30s (green ones) like the 45/55 ones do. Two 40s yes (red ones). I don't know what the 60 amper has. Two 30s would leave no margin at all on a 60amper.
You should confirm with Randy for sure what the fuses are on a 75.
If yours is not a 75 then IMO take it private with them for possible solving.
