Chassis battery does not appear to be charging

[Cwalther]

2023 Thor Miramar 35.2 chassis battery exhibits slow drain when plugged into shore power. Should shore power be maintaining the chassis battery ? When initially parked and plugged in it read 12.8, over the course of a few weeks, it has reduced down to 12.3. Yes, I know some things will slowly drain it, like the Ford data sharing (it sent me a message that it had disabled itself to not further drain the battery). My only question is: should shore power charge the chassis battery ?

 

[16ACE27]

My only question is: should shore power charge the chassis battery ?

Yes.

Go to the Thor Owners Resource Website and create an account with your VIN and you will have access to all the manuals, drawings, tutorials, etc for your MH.

 

[Mark54]

2023 Thor Miramar 35.2 chassis battery exhibits slow drain when plugged into shore power. Should shore power be maintaining the chassis battery ? When initially parked and plugged in it read 12.8, over the course of a few weeks, it has reduced down to 12.3. Yes, I know some things will slowly drain it, like the Ford data sharing (it sent me a message that it had disabled itself to not further drain the battery). My only question is: should shore power charge the chassis battery ?

In my Tellaro, it doesn't- no BIM or bi-directional charging in that model after 2022. So I added an onboard trickle charger. I don't know the Miramar setup, so hopefully another owner will chime in...
If you have lithium coach batteries, might need a Li-BIM unit and wire it in- but can be tricky, esp. if you have an e-start solenoid.
You can add a DCDC charger, trickle charger, or BIM, depending on your setup- def. go to owner's resource page in Thor website and download all docs for your year and model, make a binder and get to know the electrical system before adding anything.
Another resource is a marina tech.
Good luck!

 

[16ACE27]

There are a LOT of differences between a 2023 Thor Miramar 35.2 and a Tellaro.

 

[Mark54]

There are a LOT of differences between a 2023 Thor Miramar 35.2 and a Tellaro.

I know- but no telling what TMC does (or doesn't) for each one...