Starting Onan Generator with Lithium Batteries

[RV_Lee]

Part of the story that is not mentioned enough?
When we store and think we have done it all right by hitting the battery disconnect switch/switches, we need to keep in mind that DOES NOT remove all the loads on either battery if we don't do something special.
It's not a big load on either coach or chassis BUT if we give even that tiny load long enough, it does get the battery totally flat!
There are two groups of loads on both the coach and chassis batteries, one group after the cutoff relay and another for safety items which are BEFORE the relay and that last group stays connected even when the relay is open!
The only way to fully disconnect the loads from either battery group is to totally disconnect the battery.
Since I never like to get down and dirty with removing the battery cables, I set up some form of disconnect switch designed for that big heavy cable and put it in the negative cable.
Big reason I put it in the negative side is for safety when
I work on anything near the battery. If I happen to whack a wrench on something metal while it is on the positive connections, nothing happens if the negative is open!
If I do the same with the negative connected, I may burn up the wrench!

On your Aspect, I see no disconnect on the chassis side, so no convenient way to disconnect any of the chassis loads if one is not added. Radio presets, door locks, ignition are all light loads to kill the chassis battery slowly!

The price we may pay for the convenience of all the automatic stuff?

I really should have disconnected the negative terminal but it was "kinda" a blessing in disguise. I do a lot of desert boondocking and the last thing I want is an 8~ year old chassis battery to give me issues after sitting out there a week or so. It now has a brand spankin' new Duralast

 

[Morich]

Yes, almost every thing we do has some up and some down.
I've worked with batteries A LOT and it still is one of the things I really don't like as there are so may different small ways they can get to us!
But over the years, I gradually came around to thinking that if I did some of that nasty one time, I could avoid doing it so often.
At work, we did battery work monthly, so cutting the number of times I did it for myself was a real winner for my mind!
If I worked to keep them clean by not letting them get dirty, that cut my work a lot. RV battery racks are not always the best for even keeping the road dirt out so keeping the top cleaned was one way that I felt I had to do to keep the layer of dirt from making a "bridge" from positive to something negative. Damp dirt is a conductor and will drain the battery just like any other small drain!
Then after a while I finally came around to admitting that I was not always going to be lucky and if I had wrenches anywhere close to the batteries, I was going to short something positive to something metal that is almost always negative. That's BAD and I burned a few things before admitting I better do something different!
Kind of like learning to drive a bit more carefully after a few dings?

I finally came around to admitting that it was much better for me to add one of these to the negative lead before I did anything else, even like cleaning!
https://bpnorthwest.com/austin-heal...qsG-FpQCGyUlXd6UkfjPACYXj4popMAUEV-N_Gk&gQT=1
Lots of different types for different spaces or choice but this is one that sets on top of one of the batteries and catches my eye most any time I open the cover!
Easy to open/close without tools, so it leaves me little excuse for taking a chance on whether I slip with the tools today or not!

Combining this with covering the connections with No-Ox-A and I work far less now!

But a new one is almost always a better battery!