Does solar charge both batteries?

[Norrie59]

Our P650GJ has barely turned a wheel since collecting it in October and is hooked up to 240v on our driveway.
My question is that when we put it into storage at the end of this year (it is a wee bit awkward sitting where it is) does the solar roof panel charge both the habitation and vehicle batteries? I'm pretty sure the hook up maintains both batteries but does solar?

 

[cumbriankeith]

Yes, if it has a Scheiber EMB (Energy Management Box), which my 2019 P650 has. The system automatically couples the 2 batteries once the LB reaches 13.5v.

Here is the relevant bit of the Instruction Manual: (my bold italics)
Built-in coupler-separator
The coupler-separator ensures correct charging of the engine (B1) and auxiliary (B2) batteries by switching a
switch to place the two batteries parallel according to specific safety rules.
(By definition we will use the term B1 for Engine Battery and the term B2 for Auxiliary Battery)
The coupler-separator of the EMB unit is active by default.
Direction of coupling:
B1 to B2
Coupling if:
Presence D+ (engine running) AND voltage of B1 > 13.5Vdc
AND coupling timing B1 passed (2 seconds)
B2 to B1
Coupling if:
- presence 230Vdc without threshold
OR
- voltage of B2 > 13.5Vdc
Decoupling if:
Voltage B1/B2< 12.7Vdc
AND decoupling timer of the coupler-separator passed (3 seconds)
Safety decoupling:
Presence of D+ and presence of 230VAC leads automatically to decoupling, in order to avoid placing two
charging sources parallel (alternator and charger).
A temperature reading is taken by a temperature probe on the electronic circuit, close to the coupler contacts:
heating to more than +70°C causes decoupling.
Protection of the coupling switch:
coupling blocked if the voltage of one of the B1 or B2 batteries is less than 8 Vdc.

 

[EuroTrotters]

Depends on setup.

most Schaudt and CBE systems do

 

[Norrie59]

Thanks for that guys.
I've been monitoring both batteries under various conditions ie sunny/not and alarm on/not and concluded that the solar does indeed do what it's meant to, which is nice.
During daylight the leisure battery is a fairly constant 13.8v and the vehicle battery (which powers the alarm) steady at 12.6v. Both drop by a whisker overnight but recover quickly.
Why the difference in voltages I don't know but doubt if it matters.