[medcrest]

The two behind the tag are house batteries, and are wired in parallel with the four in front of the drive wheel.

The next question would be, should I disconnect the disconnectable trays and use a four circuit battery tender, one circuit for each of those trays, one for the tray behind the tag and one for the engine batteries?  It seems to be asking a lot to expect one tender to handle all six house batteries.  I always have a tendency to over engineer things.

If you are plugged in why do you need a battery tender? Your inverter/charger should take care of all of them.

Unfortunately, I can plug into anything more than a 15 amp house circuit.  I have covered parking 15 miles from where I live, but no 50 amp circuit.  You do what you can in the valley.