Haven't been getting away with anything really, just the right gear for the job,lol,lol, a decent regulator and my 240 charger used to be a Projecta 7 stage the same as the OP's which if left hooked up will maintain and if hooked to sick units will charge and recon if required or tell you they are stuffed...it can supply a controlled 13v supply if needed to be used as such, never needed to but the facillity was there, they have all the bells and whistles, probably why they cost a fortune......................but then Big Mal is wired totally differnt to a Jayco, if you don't have a battery you don't have lights and other 12v stuff and in my old 14.44 the Setek did the job, just and not well, I thought it plodded along charging the battery which was okay when hooked up to a big power station but when using a genny it was hopeless really took a month of sundays to boost the battery when off grid but as a keep the battery good system when parked up in the shed for months it was great.............................
Told a little fib, I get away with heaps of stuff cause I'm an all round damn nice fella........................
Anyway
@Axl how did that Projecta perform with your batteries, I suspect if you left it for a week and you looked at it occasionally you would have seen the rolling bars on the screen which is scary at first but it just means it's gone to recon mode, meant to say that before but forgot....................oh if you want a spare remote monitor for it I have one, the rest of the unit is in my recycle box.................found then to be an excellant charger.