So your buddy bought a switch and a relay and a fuse holder and a
project box to disconnect the battery??
All that instead of just a battery disconnect switch?
Glad to hear that some manufacturers are installing battery switches!
I still urge folks to do the amp meter test on fuses.
It was an eye opener to me. I took notes. It was interesting to see
how much drain the on board charger was when it wasn't charging.
Also interesting to flip on a light or 2 and see how much they use.
Other things like LP detectors and what can sometimes be a biggie--
the fridge on LP mode!
Some folks have found their fridge has a -heater- in the metal strip
between freezer and fresh food doors. This is to eliminate condensation
on that little area. Mine has a switch to shut it off. I keep it off always.
Some others have said they found they had the heater but no switch to
shut it off!! When you are trying to camp off the grid - who cares
about a little condensation on the fridge??
I could maybe agree about the anti condensation heater in very humid
conditions EXCEPT it's NOT 120 v ac heater. It's 12v DC and it's a battery
hog when you're boon docking!
BTW, there is a work around for that if you have that problem.
All those things and more is why it can be educational to do the amp
check for all circuits.
Do it when the trailer is not plugged in to shore power.
If you never boondock you probably don't care.