Boat: S34 Bob Stewart - 1959 Patiki class. Re--built by me & good mate.
I noticed a parasitic draw of 0.4A from ACR. Pull the negative wire and it goes to zero. SG200 & fluke correspond.
Specs say 175mA , is this just marketing speak?
Also when surface charge is high on house bank it stays in "combined"
until it dissipates some when charge source is removed.
it Likly has a different draw on and off. They probably give the off draw. As that is the only one to worry about. I have never measured as all boats stay plugged in. In manual they tell you to switch the neg off if left unplugged for long periods.