One bottle jack is ill advised. Two is what you will one day need.
The truck can fall way down at times and you will want cribbing
or two jacks to get it up to the height necessary. Also you will want
a 6' telescoping cheater for the lug nuts. I pulled ALL my lug nuts
and reinstalled w/ antisieze on the stud only and torqued w/ a
proper torque wrench. Do this BEFORE you get a flat and realize
one or two lug nuts do NOT want to come unscrewed. Be aware
of left and right threading too.
Unless you have 1 big 24V battery you need no converter. If you
have 2-4 12V batteries all's you need do is pull power from one
12V battery to an aux outlet. I found a fused aux outlet w/ two
cig lighter type outlets for my 5 ton for my phone and other 12V
on the road needs. I installed said before I left on my recovery
years? ago now.
CLICK HERE to see something similar to what I have.