Chassis Battery 2008 Windsport

[CAC Windsport]

Does anyone know if shore power charges the chassis battery on my 2008 36ft class A Windsport?
Its a 36F model.
I think it only charges the coach batteries, but not sure.

[16ACE27]

Easy enough to figure out if it soes:

Measure the chassis battery voltage when plugged into SP after the engine has been off for about an hour. If it's 13.0 VDC of higher it is being charged by SP.

The real question if it is not being charged is:

Is SP supposed to charge the chassis battery.

[CAC Windsport]

Thabk you.
I measured the volts and it's 12.6 v. So it does not charge the chassis battery, as I thought

[bgpeters]

I have a 2018 Windsport. Shore power charges house & chassis batteries at the same time or not at all. No charging happens if the storage switch has been tripped.

If the house battery is charging and the chassis is not, check your BIM (mounted on the frame behind the house battery compartment) - it is likely not working. A properly working BIM will sense that the house battery is receiving a charge and will connect to the chassis battery so the charge current will flow through. When not charging the BIM should isolate the two systems.