[arcticdude]

I’m pretty sure Hank is correct.  I have 2 Magnums in mine.  One is set as the primary and the other as secondary.  I can’t remember if you need to set the secondary or only the primary, but it normally does not need to be changed once set.  It’s only controlling the low side draw.

I can see where you might give up some power usage if you’re on a 15 or 20 amp circuit, as the inverter(s) will only pull to 10 amps. But that’s a minor loss.