Thanks David! Your help and encouragement convinced me to go with the Victron shunt and IP67 7/17A charger. The shunt was VERY helpful to troubleshoot a ghost draw from furnance (another story) that killed my AGM bat-tree and almost did same on the Precision...good news is Lion is harder to kill, if you dont make a habit of it...)
Maybe we can talk more in a few days about your Nobel Research? I can PM you my mobile # or email.
Take it easy, and obtw hows the new TV working out? Stylin' with the Land Cruiser?
PS: a couple notes at my basic level so far, on the victron shunt and charger use:
1. I went this way as my old 2010 had no Trimetric to show current draws. CampInn was not backfitting lithion into 2010 and earlier (which makes sense as there are a couple significant electrical changes in 2012, I understand)
But I could certainly fool with it if I chose to and following Seths lead on victron and David Rossiters on the Precision for long trips across Canada, I jumped on one last bat-tree in stock at an RV supply warehouse at a good price, understanding I might have a learning curve ahead at my own expense.
As I researched Victron I was impressed at the quality and use in marine applications, but note they are BIG and sold everywhere so getting customer service on your item is based on sales channel...ya gotta dig for answers. So far the service on that has been good, but only once I got the basics down on Ohms Law and which connects to where- why;
the leg bone to the ankle bone, current is like water in a garden hose, etc.
Again, why you need a
@Sweeney or a colleague locally from RVGeeks. Its like taking your car to the stealership vs an independent car shop that knows what they are doing, or a mobile tech who comes to you...
Its not rocket science but if you dont have basic tools there is a learning curve...or a reason to drive to the Nest before or after visiting CICO...
@David Rossiter concur on what the victron shunt does via bluetooth victron app on my iphone. The shunt is good for current and voltage, and history in and out.
So when the AutoW fuse is in, you can see on the app just how much that draws while parked,
or when you run the fantastic fan at high speed, how much, how long
or when the furnace blower kicks on (three times then off if no gas, repeatedly if you have a shorted out after market cheap digital thermostat...killing your bat-tree...
2. On victron charger; My CI has the add on bumper which has ears underneath to bolt to the frame that partly cover the tunnel where the original Marinco charger was installed. So when that old charger died, I just cut the wires and capped them off at the old Marinco
and installed the Victron shunt and AC charger in my right galley bin easy to get at, see the little blue glow that by is working etc.
i already have the added on CTEK and AutoW in there and my battery compartment was crowded with wiring for those mods I asked CampInn to add (as I bot and took over from second owner who jad it in the shop for repairs, and then decided to sell after.)
I took Craigs advice to use an AC plug in the battery compartment and just plug in the 120v plug of charger in that, vs hardwire. So if I want to take battery out for winter i take charger with and out on the bench. And if I change to another charger (I first used a Noco5 as its good for flooded cell/AGM/lion and now CI reccomends the NOCO10, easy to pull out and read lights on progress too, but no shunt, no BT)
3. The shunt and charger both connect to same bt app, and victron supports them with periodic firmware and software updates by cell or wifi on app.
4. If the lion is so dead it cant be charged by victron ac charger you may have to basically "jump start" the battery to reset the battery BMS to accept a trickle charge from the victron. Literally- apply 12v from a jump box will do it. I used my Noco jump box, but it could also be jump cables from the tow vehicle battery.
Once I did, I could see the Victron charger showing power going in, and the shunt as well. No idea why the Precision could not charge up from almost dead, without a reset but it worked...something to do with the BMS protection below a certain voltage shutting battery drain off, that prevents a charge going in if not high enough to reset, I guess.
This tip was from the Precision battery sales guy in Jax who was also the victron referred service contact for the sales channel of victron sold on amazon.
5. Next experimenting with running the victron charger off a little blue genny as I might if caught boondocking in cloudy rainy snow and solar panels cant keep up on either the CI house batt and/or extra sogens.
Two is one, One is none as they say...
I've PMd you
@David Rossiter to pick your brain on Nobel Prize research on all that...
PS: Any lurkers or existing CI owners thinking backfit to lion best to ask Cary what brand lion they are going with in new builds once the inventory of Precisions is out.
I notice lion battery tech is improving as fast as lion sogens are and lots of advantages to following the lead of CampInn with two inverter engineers with years of experience in these rolling land yachts...but these LiTime bat-trees look pretty kewl, so following closely...
And yes --- I do >if< my intention is to drum up business. If my intention is R&R, then I do not claim it.