First let me set the stage. We boondock 1-2 weeks a year. The rest of the time the trailer is plugged into shore power either in storage or at campground with hookups. We have one house GP27 wet ce...
"@BFL13: I believe the adjustable voltage would allow some compensation for wiring R (V loss) which would be a good thing. It would also allow optimum voltage for each battery type (should they be changed). The issue is where to mount it...."
This is the LK version of the "lower portion" replacement.
Check the link in this for installation --shows picture of where it goes.