Charging chassis battery

[Steamchief]

We have a 2023 Thor Scout 18m. Can I charge the Chassy battery thru the hook-up emergency starter under the hood. Enquirering minds want to know.

 

[Mark54]

We have a 2023 Thor Scout 18m. Can I charge the Chassy battery thru the hook-up emergency starter under the hood. Enquirering minds want to know.��

Assume you mean 'Scope' not Scout- and if you have lithium/UHG (underhood gen.) then yes- that is the best way to keep the chassis battery charged, and will die in 4 days or so. No bilateral charging in any of these. My Tellaro is the same way. I keep a 2A Noco charger on all winter, or when home for more than 3 days.
Battery is under the driver's feet, so much harder to connect there. Jumper posts are much easier.

When I re-wired mine, I added a Noco 2A dedicated charger to the hot side of the e-start Trombetta solenoid. You can do the same, but I expect your solenoid is underneath as mine was. My Trombetta is now inside the coach, and not all covered with road grime as seen below, before the move. It was worse when I moved it- all cleaned up and stays that way now...
You can determine the hot side when master switch is off, and test the two large terminals- live one is from the chassis battery, as seen in schematic.

I have to use the inverter and solar to keep it alive in the summer when my coach batteries are back in (removeable now). The Noco is wired to a new 120VAC outlet off the old outlet feed, now converted to a switchbox on my bed cabinet.
Plugging into shoreline does not do it- just keeps the coach batteries charged.
If you use the jumper posts, you can close the hood if you find any bare nut on chassis, instead of B- jumper post at the front edge of the closure.

I keep mine connected further inside, and route power supply to Noco carefull thru an area that won't get pinched if I close the hood. We get a lot of blowing snow here as you probably do as well.

 

[Steamchief]

Thank you Mark

Your response was just what we needed. Have the SCOPE for 3 months now and still can’t get the name right! Darlene& Gerhard

 

[WhatnxtRV]

Check to see what your BMPro monitor says for the state of change on both batteries. Plugged into shore power and not.

With my 2023 Rize (Scope) (AGM batteries) when connected to shore power, the chassis and coach batteries; both will charge. Verified with a DVM direct to the battery. There may have been a change for the 2023 and with the lithium/UHG setup.

As a note, my Ram chassis is a 2022 and the coach is 2023.

 

[Mark54]

Your response was just what we needed. Have the SCOPE for 3 months now and still can’t get the name right! Darlene& Gerhard

See response by WhatnxtRV about his Scope- maybe Thor got their S**t together and added a bilateral charging system. Would be a BIM or BIRD underneath.

Check your schematics (available to owners online via Thor's owner's portal.) to see if you have either of those devices.